When in good shape and properly serviced, such a quality watch from the 1950s or later can be +/- 10secs a day, more if pivots are worn or bent, less if in really good shape, assuming the mainspring is OK and the hairspring untouched. Parts can be a problem. Accuracy on vintage watches is hard to predict if new parts are unavailable.Can you tell me how many seconds +/- errors per day the ancient oyster clock made a hundred years ago? I'm talking about Oyster from Cyma, Rolex, Tudor and Oyster Watch Co. It is clear that now they are already worn out and the error is higher.
I'm talking about a 30mm watch from before World War II.When in good shape and properly serviced, such a quality watch from the 1950s or later can be +/- 10secs a day, more if pivots are worn or bent, less if in really good shape, assuming the mainspring is OK and the hairspring untouched. Parts can be a problem. Accuracy on vintage watches is hard to predict if new parts are unavailable.
It is my day job to work on vintage watches...
Seiko chrono and women size omega:
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A few of mine:
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I love ancient 30mm watches. This is exactly my case size. Diana silver and radium.1940s or older watches can be also accurate, but they often had a rough life. Also they rarely have a shockproof balance so fall on hard floor - bent balance pivot - horrible accuracy is not uncommon.
And the parts are less standardized - more problems.
Yes, old type is my favorite razor. Not only do I like old watches and razors, I also buy old clothes. Old clothes have a thin, ideal waist for me and I order them to tailors as a sample. Without a sample, they don’t understand exactly how I want to sew for myself.34mm is the old standard from the 50s to 60s men's watches: fits well for a lot of people. 30mm is more a US style of the 40s, a bit too small for me. But it is coming back, a small vintage Cartier is hot stuff these days.
A shame that you can't find such thin and small modern watches with simple yet detailed dials anymore. Those old 34mm Omega/Longines/Rolex etc are a bit like a vintage Gillette for me, a very cool tool that you can still use fairly often you are careful.
A full 18k Zenith, the sharpest 1950s gold watch I saw last year :
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My neck hurts but I figured out who made it.
See if I can make it a full day wearing this 42mm Black Titanium beast.
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TOTALLY. I don’t believe I’ve ever worn it for a complete day in the 2 or so years I’ve owned it. I’ve sold so many watches I’m trying some on before they hit the selling block. Might make a multi watch trade at a local jeweler that I’ve dealt with in the past. Likely a 7-8 for ONE deal! Stay tuned.This watch seems out of the norm for you.