• Welcome to Photrio!
    Registration is fast and free. Join today to unlock search, see fewer ads, and access all forum features.
    Click here to sign up

In Praise of Clockwork mechanisms


I don't know about the Omega mechanical watch but I know about accuracy of quartz watch. Most of the $10 quartz watch can keep time to about 1 sec a day or better. I read some where that a well adjusted mechanical watch accuracy is about 5 secs a day but however a quartz watch is slow it's consitently slow but for the Omega that someday it's slow and someday it's fast so that over a year or so the Omega isn't worse than the $10 quartz watch.
 
I've not worn a watch in years, but when I did, only the cheap ones worked for me. A nice watch, mechanical or quartz, would die after a few months. It's strange. My paternal grandfather had the same issue.

Neither sync with an atomic clock, so human error means the time will likely be "wrong" regardless of accuracy. The Omega is more than accurate enough for personal use, has class, and looks much better than a $10 quartz watch.

"Better" isn't always better. Duct tape has superior holding power than cellophane tape, but I wouldn't use the former to wrap a gift.
 
Last edited:
In the 1960s I had need for time accurate to a second or two. The National Bureau of Standards broadcasts from WWV and WWVH were often available, but a watch would have been more convenient. A Bulova Accutron sounded ideal. In practice it was unreliable and too inaccurate.
 

Very interesting and that Ulysse Nardin GMT Perpetual is beautiful.
 

Five seconds is good. The better mechanical watches are submitted by their manufacturer for COSC Certification,

https://en.wikipedia.org/wiki/COSC

That is a good link that describes the process and standards.

The rate at which a watch will gain or lose time also depends on its position (dial up, down, etc., while being worn).

To counteract position variation, an extremely expensive complication is the tourbillon - whereby the entire escapement mechanism rotates through 360 degrees. To see one of these operate in real life is almost magical.

https://en.wikipedia.org/wiki/Tourbillon
 

There are some watches today that will automatically sync with GPS systems.
 
In my active ham days (VE7APC), I listened to WWV every day. Mostly 15MHz There was an evening CW sked and the guy would not hang around for more than 5 seconds.
Settled a lot of workplace arguments about accurate time, as well. Some claimed that the clocks in our building showed every time zone on earth. (Nobody's job to adjust them!)
So, admin bought a whole bunch of GPS clocks. At last! Did not work indoors because of all the iron rebar in the concrete building frame & floors!
 

I have a number of HP calculators but I had the 41C which was stolen. I replaced it with a 41CV with the time module. I have a number of 41CX with Opt 001. I sold them all but one. After fine tuning the 41 clock I could get it accurate to something like 2 seconds a year.
 

Yes. I have the 41C time module as well. Its capabilities are impressive.
 
There used to be "external self timers" for cameras, right? Basically a clockwork mechanism you could set from one to several seconds and it connected to a cable release, holding the shutter release down (in Bulb mode) for the timed interval.

It'd be great for simpler cameras that didn't have a self timer built in.

I seem to recall seeing one - a very small rectangular metal box with a dial, cable connection, and release.
 
 
How did we get from cameras to watches? This is the real world! Behave or else...
 
Flavio81,my Nikkormats with Nikkor lenses will outshoot your RB67 any day, and unlike you, I do not have a hernia...
 
I'll use either, though most of my cameras have electronic shutters (OM2n, OM4T). If you're doing action photography and using the OTF auto mode, the electronics make that possible. In manual mode, obviously, a clock mechanism does the same job as electronics, and both have their own failure modes.

I suppose if the chips or circuit boards go bad (in my collection, most likely the OM4), right now you're kind of hooped. If there was enough demand, an aftermarket chip (or a full replacement for all of the internal circuits) could be made. Not economical for a few cameras but if there were 50 or more cameras needing electronics replacement, it very well could be economically viable to rebuild a 'modern' equivalent replacement circuit kit. I've done this work for a well known analogue tape deck (the Stephens 821b) and there are guys out there that could re-manufacture the electronics for some of these film cameras - although there is a dividing line as to what camera makes sense to tackle. One advantage of those LSI chips in simpler film cameras (I'm thinking of the manual focus, aperture-priority OM2, and at the 'complex' end, perhaps the OM4) is that the 'guts' are not that complex and could be reverse-engineered with fairly simple tools - the test/alignment tools and testers for that camera type, some normal electronic tools, and a decent working knowledge of both photography and electronics.
 
I assume salvaging another body to extract such IC is still more economic than re-manufacturing such.
But still, exchanging IC's as such can be mechanically tricky and sometimes necessitate re-calibration of electronics.
 
I assume salvaging another body to extract such IC is still more economic than re-manufacturing such.
But exchanging IC's as such can be mechanically tricky and sometimes necessitate re-calibration of electronics.
 
You must log in or register to reply here.
Menu
Log in
Register