The best accuracy you have gotten with your watches?

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Mr Levity

· #3 · Aug 8, 2014

2

6106 from '69. +5 sec/24hrs

Hamilton 66b from '74 +4 sec/24hrs

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E

I love accurate watches!

I use the Twixt app to get a feel for the accuracy of the watches in my collection.

The following are some representative examples (left to right): Mondaine World Timer auto, Seiko Bullhead auto, Hamilton Railway Special, original Ball Trainmaster, and, of course, the accuracy leader in my collection (including pure quartz movements), the Bulova Accuquartz (quartz-regulated tuning fork movement).

Thanks for the interesting post.

Best regards,

Ed B.

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scubaholic

Discussion Starter · #5 · Aug 8, 2014

Best I ever had was on my Miyota 8215 for a Boschett diver that was "thrown out" accidentally by my wife. -2/24 hours

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Grammarofdesign

· #6 · Aug 8, 2014

I too like the Twixt app on the iPad to time watches, but nothing beats a peice of paper and a log over several days/weeks against an atomic clock. You'll see why below.

Best: Rolex Datejust - Using paper log, it came in from the factory at +0.7 sec/day Now almost three years old it is still at exactly the same +0.7 spd.

Note that Twixt returned "+0 sec/day" which was super cool but not right so so I did it again, as you can see it returned +0 spd a 2nd time !

Quite honestly I don't need more than 1 minute a day from my beloved vintage collection.

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chévere

· #7 · Aug 8, 2014

Easily my CWC Royal Navy Diver with a quartz ETA movement. I don't think I've set it since I bought it. Plus it has no date so it's really simple.

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twall3

· #8 · Aug 8, 2014

With the Twixt app, my Squale 20 Atmos (ETA 2824) clocks (watches in?

) at +3.2s/day. My SKX is around +15s/day. Pretty good until I look at my 8F56 HEQ which is still tick-on with time.gov after 6 months!

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Grammarofdesign

· #9 · Aug 8, 2014

twall3 said:
With the Twixt app, my Squale 20 Atmos (ETA 2824) clocks (watches in? ) at +3.2s/day. My SKX is around +15s/day. Pretty good until I look at my 8F56 HEQ which is still tick-on with time.gov after 6 months!

Now that's impressive!

Be careful though, for these types of tests, for argument's sake, it could have gained 2 seconds in Feb and then lost 1 sec in March and 1 sec in April and been back to spot-on.

My Bulova Precisionist I sold claimed 15 sec/year. My 1978 Grand Seiko Quartz (see avatar) was claimed to be +/- 10-20 sec/year when sold. I have never tested it because it is clearly really close to spot on.

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TheTigerUK

· #10 · Aug 8, 2014

All my project watches are dead on twice a day but i dont know what they will be like when they have batteries or the movement running

Sorry just being a dick head

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twall3

· #11 · Aug 8, 2014

Grammarofdesign said:
Now that's impressive!

Be careful though, for these types of tests, for argument's sake, it could have gained 2 seconds in Feb and then lost 1 sec in March and 1 sec in April and been back to spot-on.

My Bulova Precisionist I sold claimed 15 sec/year. My 1978 Grand Seiko Quartz (see avatar) was claimed to be +/- 10-20 sec/year when sold. I have never tested it because it is clearly really close to spot on.

I think you're probably right about it gaining and then losing such that the differences wash out. Frankly, because of it's claimed accuracy, I don't really feel the impulse to check it a often as my other watches....but it could be an interesting study!

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stil

· #12 · Aug 8, 2014

scubaholic said:
Automatic/Solar/Quartz doesn't matter to me.

I have read that the Miyota 8200 series were actually pretty close to COSC.

My Rolex 14060 is +2/day.

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Selym

· #13 · Aug 8, 2014

My 8L35-0010 Marine Master is my most accurate mechanical watch. I did an extended test a few years back, and it gained 35 seconds in just under a month. Not bad!

8L35-0010 Accuracy Test

Myles

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nikidasi

· #14 · Aug 8, 2014

Grammarofdesign said:
Be careful though, for these types of tests, for argument's sake, it could have gained 2 seconds in Feb and then lost 1 sec in March and 1 sec in April and been back to spot-on.

That's exactly what happens to non-Thermo-Compensated quartz.

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A4VC

· #15 · Aug 8, 2014 (Edited)

I have a SARG005 that's running consistently +6.1 a day. I've heard that's pretty good. Measured with the Twixt app.

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wengis

· #16 · Aug 8, 2014

A simple Seiko 5 with 7s26 movement was running at +1 sec/24 hours. Much better
than many of my others, and more expensive, watches.

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chévere

· #17 · Aug 8, 2014

I just spent a little quiet time regulating my 6139-6002. It's hardly scientific or conclusive, but I'm pretty pleased with this considering the watch is 43 years old!

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Grammarofdesign

· #18 · Aug 8, 2014

Glad to see you got your Kello to work. Are you happy with it overall?

I have heard mixed reviews.

Bottom line - is it worth $10 ?

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ivorbiggin

· #19 · Aug 8, 2014

TheTigerUK said:
All my project watches are dead on twice a day but i dont know what they will be like when they have batteries or the movement running

Sorry just being a dick head

:08:

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chévere

· #20 · Aug 8, 2014

Grammarofdesign said:
Glad to see you got your Kello to work. Are you happy with it overall?

I have heard mixed reviews.

Bottom line - is it worth $10 ?

It's earned its reputation for being difficult to get it to work properly, but once you do figure it out, it works well. What has worked for me is using a set of earbuds that have the microphone built in. Using the iPhone mic never worked for me. I attach the mic facing up on a mousepad using some Rodico, then I lie the watch on top of it with the balance as close to the mic as I can get it.

I'll try to get a few pics of how I've managed to get it working. The bottom line is that it's great -- if and only if you can get it to "hear" your watch. That's the biggest challenge, but once you've got it working, it's definitely convenient. I will say that the developer updated it yesterday for the first time in ages, and the update seems to have improved the mic pickup.

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