RK Watch Service

Mandaue, Author at RK Watch Service https://rkwatchservice.com/author/mandaue/ Watch Repair & Restoration Service Mon, 18 May 2026 04:25:28 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://rkwatchservice.com/wp-content/uploads/2024/03/cropped-RK-Watch-Service-Logo-Chicago-Watch-Repair-Web-32x32.png Mandaue, Author at RK Watch Service https://rkwatchservice.com/author/mandaue/ 32 32 *New and upcoming Credor watches* https://rkwatchservice.com/new-and-upcoming-credor-watches/ Fri, 15 May 2026 13:22:38 +0000 https://www.watchuseek.com/threads/new-and-upcoming-credor-watches.5644105/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

Creating an all purpose thread to discuss new and coming Credor releases, similar to the one for GS models initiated by @ahonobaka.

As he urged there, “Let's be courteous/cognizant of leaks (aka avoid them please) since this is a sponsored forum....

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]]> Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

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Creating an all purpose thread to discuss new and coming Credor releases, similar to the one for GS models initiated by @ahonobaka.

As he urged there, “Let's be courteous/cognizant of leaks (aka avoid them please) ~~since this is a sponsored forum.”~~

To get a sense of recent Credor activity, @Plus 9Time has helpfully summarized the brand's…

*New and upcoming Credor watches*

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]]> New ‘Rotocall’ digitals with mode-changing bezel https://rkwatchservice.com/new-rotocall-digitals-with-mode-changing-bezel/ Wed, 15 Oct 2025 08:26:53 +0000 https://www.watchuseek.com/threads/new-%E2%80%98rotocall%E2%80%99-digitals-with-mode-changing-bezel.5646381/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

SBGJ017/019/021/023/024
Listing: SBJG017 | セイコーウオッチ

According to @Plus 9Time these are reissues of the 1980’s ‘Rotocall’ w...

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SBGJ017/019/021/023/024
Listing: SBJG017 | セイコーウオッチ

According to @Plus 9Time these are reissues of the 1980’s ‘Rotocall’ watches

(Ad shared by Fratello)

PS This takes Seiko closer to a fitness watch, discussed in this…

New ‘Rotocall’ digitals with mode-changing bezel

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]]> GP Laureato Fifty https://rkwatchservice.com/gp-laureato-fifty/ Tue, 07 Oct 2025 11:34:08 +0000 https://www.watchuseek.com/threads/gp-laureato-fifty.5645419/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

Just announced as a limited edition of 200

...

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Just announced as a limited edition of 200

New cal. 4800.

Bracelet with 4 mm of fine adjustment

https://www.girard-perregaux.com/row_en/81008-63-3412-1cm.html

What do folks think?

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]]> Should this forum welcome Credor posts? https://rkwatchservice.com/should-this-forum-welcome-credor-posts/ Thu, 25 Sep 2025 07:31:00 +0000 https://www.watchuseek.com/threads/should-this-forum-welcome-credor-posts.5643897/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

Credor joining W&W 2026 is a sign that the international profile will be further raised.

Should this forum actively wel...

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Credor joining W&W 2026 is a sign that the international profile will be further raised.

Should this forum actively welcome Credor posts?

Currently the Seiko forum host one Credor thread and the occasional post of a Credor watch, usually vintage and mechanical.

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]]> The future of Spring Drive is thinner and hybrid https://rkwatchservice.com/the-future-of-spring-drive-is-thinner-and-hybrid/ Fri, 19 Sep 2025 04:10:04 +0000 https://www.watchuseek.com/threads/the-future-of-spring-drive-is-thinner-and-hybrid.5643210/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

With the caveat that no single patent application indicates a future product, here are my prognostications on the future technological path of Spring Drive, with explanations based on both Seiko patent filings and my reading of the 2025 watch market.

...

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With the caveat that no single patent application indicates a future product, here are my prognostications on the future technological path of Spring Drive, with explanations based on both Seiko patent filings and my reading of the 2025 watch market.

(from Akio Naito presentation during W&W 2025)

1. SD has always been a response to customer needs, as expressed by market…

The future of Spring Drive is thinner and hybrid

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]]> Seiko patent application for GPS watch with TC https://rkwatchservice.com/seiko-patent-application-for-gps-watch-with-tc/ Fri, 29 Aug 2025 08:50:47 +0000 https://www.watchuseek.com/threads/seiko-patent-application-for-gps-watch-with-tc.5640612/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

Seiko has applied for a US patent for a thermocompensated GPS watch.

This is denoted Fujisawa (2024), PDF atttached..

Her...

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Seiko has applied for a US patent for a thermocompensated GPS watch.

This is denoted Fujisawa (2024), PDF atttached..

Here is one diagram from the patent, which mentions both thermocompensaiton and time correction:

In laymans terms, this could be describing an Astron GPS watch with TC. (TC has entered the watch conversation in forums such as Reddit, as shown by Omega's webpage for the…

Seiko patent application for GPS watch with TC

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]]> Citizen cal. H147 https://rkwatchservice.com/citizen-cal-h147/ Fri, 29 Aug 2025 03:41:31 +0000 https://www.watchuseek.com/threads/citizen-cal-h147.5640591/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

I see only one mention of H147 in this forum. Anyone have one of these?

H147 powers the "world's thinnest* Eco-Drive radio-controlled watch" at 7.0 mm. This was as of Nov 2023:

...

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I see only one mention of H147 in this forum. Anyone have one of these?

H147 powers the "world's thinnest* Eco-Drive radio-controlled watch" at 7.0 mm. This was as of Nov 2023:

Link: シチズンウオッチオフィシャルサイト

The H147 models seem to be ref CB114x and CB115x

Also, diameters are around 38 mm, while the H145 models are 40+ mm.

Is it perhaps a smaller and thinner…

Citizen cal. H147

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]]> New details about the new SLGB001/003 casing https://rkwatchservice.com/new-details-about-the-new-slgb001-003-casing/ Mon, 25 Aug 2025 06:18:43 +0000 https://www.watchuseek.com/threads/new-details-about-the-new-slgb001-003-casing.5640088/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

No GS with the 30 mm 9R65/9R15 is less than 39 mm in diameter. Yet the SLGB001/003 with a 30 mm 9RB2 achieves 37 mm.

How did they do that?

A Japanese-language article in webchronos.net offers an answer:

1) 9R6 required an anti-magnetic casing ring a...

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No GS with the 30 mm 9R65/9R15 is less than 39 mm in diameter. Yet the SLGB001/003 with a 30 mm 9RB2 achieves 37 mm.

How did they do that?

A Japanese-language article in webchronos.net offers an answer:

1) 9R6 required an anti-magnetic casing ring as it (specially, the glide wheel) is susceptible to magnetic interference. Cal. 9RB2 integrates the anti-magnetic components within the movement itself. I think this…

New details about the new SLGB001/003 casing

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]]> Fashion website Jamais Vulgaire article on HAQ https://rkwatchservice.com/fashion-website-jamais-vulgaire-article-on-haq/ Mon, 18 Aug 2025 08:12:55 +0000 https://www.watchuseek.com/threads/fashion-website-jamais-vulgaire-article-on-haq.5639211/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

JV is a francophone-centered fashion website, covering men's clothes, shoes and accessories including watches.

They offered up an English-language HAQ article on May 20:

...

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JV is a francophone-centered fashion website, covering men's clothes, shoes and accessories including watches.

They offered up an English-language HAQ article on May 20:

jamaisvulgaire.com

± 5 sec/year: 2025 Ultimate Guide to Ultra-Accurate Quartz Watches Challenging Mechanical Prestige

In the shadow of mechanical complications adored by purists, a silent revolution is underway. Watches that deviate by only a few seconds a year are redefining our relationship with precision and…

jamaisvulgaire.com

It claims, "an elite group of insiders has already understood: the future of watchmaking precision lies not…

Fashion website Jamais Vulgaire article on HAQ

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]]> Seiko Epson’s single-package TCXO circuit block https://rkwatchservice.com/seiko-epsons-single-package-tcxo-circuit-block/ Sun, 17 Aug 2025 10:27:47 +0000 https://www.watchuseek.com/threads/seiko-epson%E2%80%99s-single-package-tcxo-circuit-block.5639085/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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Mandaue

Seiko Epson’s cal. 9RA in 2020 marked the introduction of a single package or ‘chip’ that included an XO, IC and temperature sensor within a vacuum.

The chip in the 20 spy rated cal. 9RB2

...

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Seiko Epson’s cal. 9RA in 2020 marked the introduction of a single package or ‘chip’ that included an XO, IC and temperature sensor within a vacuum.

The chip in the 20 spy rated cal. 9RB2

It was described by Seiko marketing in 2021 as (link now dead):

QUOTE
The innovation with which Hiraya struggled most was the “high precision Spring Drive package IC,” which he wanted to create in order to achieve an accuracy rate of ±10 seconds per month. It is a new…

Seiko Epson’s single-package TCXO circuit block

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