I’m from China. It was difficult for me to join this forum. Because we can’t visit Google.com and thus I can’t pass the reCAPTCHA verification.
Recently, I’ve been choosing a HAQ watch.Because I’m tired of the errors of mechanical watches.
I’ve learned a lot of knowledge about HAQ from this forum, such as the principles of the movement, the mechanism of thermal compensation, etc. I’ve also seen many sharing posts from friends.
In return, I will also share my watch to everyone.

I bought…

Glad to join here and share my The CITIZEN AQ4091-56M.

As I discussed in below quote, Seiko has patented a new HAQ method with dual oscillators (likely based on an older Citizen method for which the patent has expired).

CitizenPromaster said:

———— NEW SEIKO PATENT WARNING ————–

What is also jumping out at me this time, is that JPS57116287A recently got cited by none other than Seiko Epson.

View attachment 18861739

The Japanse characters don’t give anything away to us…

Click to expand…

Seiko HAQ wristwatch with a cesium atomic oscillator (chip-scale atomic clock)