crown comfort
12358
Manual winding
yes, almost all Gyromatics (HF or not) with calibers 31 to 33 have the problem that with time the winding via the crown is getting stiffer and stiffer. Even after service, this typically remains. Don't force it. The Gyromatic auto-winding is very efficient, so just give it a few shakes and then wear the watch and it will be good. Later calibers 41 … are a bit better but sometimes suffer from the same problem. Your only way out is to find a manual wind Chronometer HF with Caliber 30.5 
GP Observatory Chronometer Movement and Vid
I hope I'm not boring people still talking about my Observatory Chronometer. In case I'm not, here are long promised close ups of the movement and a vid of high beat balance at work. Looking at back of the case cover I can see a service mark (only one...)...
Great pics, Dan. Yes, indeed the movement is in great shape.
... If it is not broken, don't fix it! You really hit the jackpot, if I may Ken
What other pics would you like to see?
I'll be happy to take them and post. Btw, anyone that owned a GP HF watch noticed that manual winding is very tight?
Manual winding
yes, almost all Gyromatics (HF or not) with calibers 31 to 33 have the problem that with time the winding via the crown is getting stiffer and stiffer. Even after service, this typically remains. Don't force it. The Gyromatic auto-winding is very efficien...
Thanks for the info!
Hmmm... Any idea what causes it to become stiffer? Bent crown or stem? Something else? Let's see want happens after service. Talking of service, can anyone recommend a watchmaker in Florida or somewhere else (I don't mind shipping)? I have a guy I usually...
Well
I did read somewhere it has to do with the Gyromatic design and only replacing original parts will fix it for a while before it gets stiff again. Just accept that as a vintage flaw as long as everything else works well. Finding a good local watchmaker? Ne...
:)
Stiff manual winding doesn't bother me. It's automatic after all. Lol. And everything else works amazing. I just got another GP HF off eBay for pretty cheap. Not working. Watchmaker told me it's a mainspring problem. So I might have a second GP HF . I gav...
Indeed, the manual winding is often tight...
When it comes to a beauty like this - any photos will do! Best Blomman
That's what I am talking about! :)
Doesn't matter what kind of shots - this one is a beauty! Best Blomman
I have noticed
the GXM eport code on many of the Gyromatic High Frequency Chronometers and I suspect that most of the production was sent through Jean Graef in New York to be distributed throughout North America. Where else is everyone sourcing theirs from? I bought one...