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For 60 I bought this. And I do travel a lot, in Australia right now, from Canada Sent from my iPhone using Tapatalk Pro

OK I can forgive those, they are a work of art... More here -> https://struckcontemporary.com/collections/vendors?q=DAN+TANENBAUM ... although if I had the money for one of those, I'd probably rather spend it in some real watches.

Judging by the number of turns before release, mainspring dislodges from thr barrel.

You have to take the movement apart, just by sound one can identify the area that might be subject to repair. After a closer inspection one can say exact whats erratic or needs to be repaired.

This part has been set wrong. It should be in line with the pallet tail. Looks like just below the block the s/spring is twisted. These clocks are extremely temperamental, they run on very little oil, the m/spring is very powerful. Always fit a new s/spring. The clock must be in beat or it will stop, to set it in beat (quick description) after the pallets release a tooth the pendulum must carry on at the same distance both ways. There is a tool you could buy to help in setting up the beat. I found it to be very good. Here is a photo of that tool. Tmuir has explained in good detail about these clocks.

If these clocks interest you I very much recommend getting the book the 'Horolovar 400 Day Clock repair guide' by Charles Terewilliger and H.W. Ellison. Looking in this book you are correct that it is circa 1970, it is a Kieninger & Obergfell Miniature / Midget clock and uses 0.0023" (0.058mm) Horolovar suspension wire. The book will give you drawings to set up the wire as setup is millimeter critical. Yours also appears to be missing the cover that screws onto the back plate covering the suspension wire, but this seems to be a common issue and wont stop it working. You will need a mainspring winder to remove the spring as just pulling it out like you can on larger clocks will damage this spring.

Superb collection of Casio's and Seiko's....the trench watches are stunning. Thanks for posting these, I have some serious watch envy right now. Seiko's and trench watches are my favourites. My oldest Seiko is a 5 DX from September 1967 (birth watch- present to myself for my 50th) all my other Seiko's are 'modern classics' SARB033 Spirit, SARB065 Cocktail Time, SARB017 Alpinist, SPB051J1 Prospex Diver 'reissue' of 62mas, the SPB051J1 is as good as Rolex in my opinion, the 6R15 is a nice movement. SARB017, SARB033, SARB065, never worn, still in the boxes they came in...oh the shame of it.

All computers have a clock. And since it's usually a CMOS (complimentary metal oxide semiconductor) with no real attempts to make it all that accurate, it usually isn't. The windows operating systems prior to W-10 have the ability to set the time and date as well as choose your time server. However, the frequency of syncing with the time server of your choice, is not a user defined value. Windows sets it by default at 1,036,800 seconds or, 1 week. Your CMOS clock is free to be totally inaccurate in between sync events. The only way to change this is to edit the registry on your computer. Not everyone cares to muddle around in the registry because bad things can happen if you muck it up. However, if you go to www.worldtimeserver.com/atomic-clock/ you will find a very small applet that is free to download. It's only 891kb so it's quite painless. It adds the ability of a user, with administrator privileges, to easily set the sync time to a more useful pattern. It will also allow you to connect via the internet to the NIST (National Institute of Standards and Time) in the US and allow your computer to become in essence, a repeater for the Atomic Clock which has an accuracy of -1 second every 400 years. The file you will need is AtomicClockSync V3.5 and it adds absolutely nothing to your computer in the way of programs. It is merely an applet that edits your registry for you. I've tried it out and it is both virus free and correctly written. Further, you can save the applet on your computer. I placed mine in a folder aptly named, Atomic Clock, and set my sync value at 1 hour, or in my case, 3600 seconds. Now, anytime my computer is on and I'm connected to the internet, I'm automatically synchronizing with the NIST every hour and I know the correct time when I'm setting a watch or measuring accuracy. Should I feel the need, I can access my folder and relaunch the applet to change the sync frequency any time I choose. Cheers, Don