Been working on a project making strap adapters for my Oris Aquis. Now that the prototype is off to be machined, figured I’d work on a watch and post up as I go.

Intent is to use a La-Joux Perret G100 movement, so SW200/2824 envelope. 42mm diameter case. Lug to lug around 48mm.

Modeled up a fairly standard case to start with, just for working out all the internals for the movement.

Printed up a quick mock up to check proportions.
[ATTACH…

Figured I’d take a stab at making a watch

My 80’s 17 jewels ETA 7750 Chrono have some day/date wheels that have seen better days. But most I can find with german day wheels are described as “2010+ movements”…

Will the ETA 7750 day date wheels from later movements fit the 17 jewels movement?
And if not a direct fit, what need to be done to make them fit – if possible?

My Pre-Bond midsize Seamaster (ref 396.1042) runs fine, but screwing in the crown is rather tenuous. It is very difficult to catch the threads, and, once caught, the crown only rotates about a half-turn. It also does not sit flush against the case. I presume the crown and case tube are on their last legs. Since this is a quartz watch that serves as my beater, I’m not inclined to spring for a full service. What I am considering, though, is replacing the case tube and crown myself. The case…

Read more

I recently acquired a TAG Heuer Carrera Classic Chronograph 1964 Re-Edition CS3110 with Lemania 1873 caliber. The watch aesthetically is in good condition with no major dings or scratches. The timegrapher shows about +20spd with an amplitude of 260deg and 0.1ms beat error (lift angle 50deg).
It’s a ~25 year old watch with unknown service history.
I am planning on wearing it, keeping it, and passing it on to my kids.

Question: would you send it for full service now or wait?

[ATTACH…

Service this Tag Heuer 1964 Re-Edition CS3110 ?

Hello there!

I recently bought a Nivada Grenchen CASD from a seller on ebay. It arrived in excellent condition aesthetically, but it was stopping over night. This morning it had stopped again and I was able to get it to run again after engaging the chronograph. It kept running (and still is) all morning. I took it to my local watchmaker to see what was up.

Watchmaker found a shattered jewel on the minute wheel. He was able to clean it up but he said he’d never seen a movement with this…

Servicing/Parts for Sellita SW510 M BH B

I have a few old quartz watches amongst the herd of automatics and manual winds.

Most have standard threaded backs easily removed.

But this Elgin Swissonic model is different and I’d rather not make a mess of it trying to access the battery.

Any thoughts on removing the battery cover / case back?