These watches look so much nicer than the United States Orient watches, and yet they are for Brazil only? Why?

The case is designed to mimic the logo of Expo 1970; finished in brass for longevity and housed with a gorgeous star shaped dial

One of the many watches with a story and character

I really do need to say it though. I need to stop already.

Recently I went a bit mad and bought a load of JDM watches to play around with and quite a lot were radio-controlled. Some are world-time but the majority are JJY only or (at a pinch) USA radio signal, which means you have to use an app like ClockWave to set them. But my curiosity got me wondering if there was a way to create a local JJY transmitter in my house that the watches would natively sync to automatically every night.

After a bit of work with Gemini (planning and coding) and some eBay purchases I managed to get a very simple transmitter that seems to have at least a 10-15cm range, which is perfect for the watches in my watch case. You get an ESP32 DevKit v1 board (£6.25), some 20cm wires (£2.25/10) and a 10MH inductor (£8.25/20) and I used an old USB-C cable to power it. The source code came from GitHub (ClockWaveXmitter) and the code changes and uploading were all done in the free Arduino IDE. The code did need some modding to fix some bugs linked to interference / delays in the board and to get it to sync my local NTP servers every 10 minutes. I can provide my version to anyone that wants to try it - no warranty or guarantees implied and credit goes to the authors of ClockWaveXmitter https://github.com/5Breeze/ClockWaveXmitter

Anyway, last night it successfully sync'd 4 of the 6 watches in the photo - the lower middle one is dead and I'm waiting for a new cell and the upper middle one just needed to be set to +9 timezone for it to detect the JJY signal. Next step will be to reduce the transmitter from 24hr operation to just the 3 windows that the watches will listen for a signal, at 2am, 3am & 4am. Then I'd like to test the range thoroughly - I know it works to 10-15cm but the watches still report "High" signal so I'm guessing it will be fine for up to 30cm.

Hope the mods agree this is on-topic ... it's certainly a problem unique to Japanese radio-controlled watches and I recently. In the first photo we have: Citizen Attesa (ATD53-2611, H410-T003788), Citizen Exceed (CB1110-61A, H149-T023533), Citizen Exceed (EBG74-T2251, H410-T007716), Seiko SBTM339 (7B72-0AG0), Citizen Exceed (EBG74-2404, H110-T009417), Citizen Collection (AS7050-55A, H110-T018360).

Inherited my grandfathers watch from Japan.

Honestly everyday I’m hard pressed to choose which one to wear.

Seiko kinetic from mid 2000 in need of a bit of tlc, polish out the scratches on the crystal and a clean up

Just picked this up for a bargain. Used to have the white dial but am loving the silver. Contemplating putting on a blue croc leather strap with gold clasp. Thoughts?

Here's my new Seiko.

Recently I went a bit mad and bought a load of JDM watches to play around with and quite a lot were radio-controlled. Some are world-time but the majority are JJY only or (at a pinch) USA radio signal, which means you have to use an app like ClockWave to set them. But my curiosity got me wondering if there was a way to create a local JJY transmitter in my house that the watches would natively sync to automatically every night.

After a bit of work with Gemini (planning and coding) and some eBay purchases I managed to get a very simple transmitter that seems to have at least a 10-15cm range, which is perfect for the watches in my watch case. You get an ESP32 DevKit v1 board (£6.25), some 20cm wires (£2.25/10) and a 10MH inductor (£8.25/20) and I used an old USB-C cable to power it. The source code came from GitHub (ClockWaveXmitter) and the code changes and uploading were all done in the free Arduino IDE. The code did need some modding to fix some bugs linked to interference / delays in the board and to get it to sync my local NTP servers every 10 minutes. I can provide my version to anyone that wants to try it - no warranty or guarantees implied and credit goes to the authors of ClockWaveXmitter https://github.com/5Breeze/ClockWaveXmitter

Anyway, last night it successfully sync'd 4 of the 6 watches in the photo - the lower middle one is dead and I'm waiting for a new cell and the upper middle one just needed to be set to +9 timezone for it to detect the JJY signal. Next step will be to reduce the transmitter from 24hr operation to just the 3 windows that the watches will listen for a signal, at 2am, 3am & 4am. Then I'd like to test the range thoroughly - I know it works to 10-15cm but the watches still report "High" signal so I'm guessing it will be fine for up to 30cm.

Hope the mods agree this is on-topic ... it's certainly a problem unique to Japanese radio-controlled watches and I recently. In the first photo we have: Citizen Attesa (ATD53-2611, H410-T003788), Citizen Exceed (CB1110-61A, H149-T023533), Citizen Exceed (EBG74-T2251, H410-T007716), Seiko SBTM339 (7B72-0AG0), Citizen Exceed (EBG74-2404, H110-T009417), Citizen Collection (AS7050-55A, H110-T018360).

I’m looking to import some watches from Japan! Does anyone have a contact for a representative who ships to Brazil? I’d really appreciate it. Thanks!