Put down your hammers and back away....Just kidding . Some members have stated thar's how they service Timex Watches .
I picked up this Timex Electronic , back-set , front loader at the swap meet for $8 . It wasn't running and had an AG10 battery still installed , but with no visible damage to the movement . This one has the M87 movement with the date .
This is a late 60's model called " The Blue Nebula " with a West German movement that was produced by the Laco watch company that Timex acquired when they bought Durowe-Laco at the end of 1958 to get into the electronic watch arena ..... http://electric-watches.co.uk/makers/laco/
I got home from the swap meet , opened the watch up and installed a new battery . The watch would only tun for a minute or less . I did some reading on this movement and started to disassemble it for a service . If you have ever tried to service a Timex you know why the hammers are used .
I got as far as taking off the magnet and then the balance and then a voice from above said , " don't do it . Don't go any further "...so I didn't . What I did do was to clean and tighten any electrical contacts that I could reach , and put a light oil on any jewels and bushing in reach and assembled the watch again .
At that point it would tun for an hour or two , and stop . I would shake it and get another couple of hour worth of run time . I left the watch under a light bulb for a while and it ran for approx. 24 hours . Back to the light bulb treatment that I may patent and the watch has been running for 5 days now and actually keeping very accurate time .....Honest .
I had a watchband in my stash but have had to file some areas where the lug area of the watch was binding . I still have to smooth and buff those areas so it has a better finish .