





It’s fun to get the occasional mechanical watch with battery changes.
Mass, movement + case + band: 170g
Dimensions, case: 43.9mm diameter x 13.3mm thick
Band lug size: 16mm
Year Made: 2012
Watch Model: Eco Drive
Number on Dial: None
Numbers on Case Back:
Caliber Number: B612
Serial Number: 1O1020034
Case Number: S071232
Crystal diameter: 33.8mm
Mass, movement + case + band: 68.5g
Dimensions, case: 50.6mm diameter x 17.5mm thick
Mass, movement + case + band: 85.7g
Dimensions, case: 33.1mm diameter x 7.77mm thick
Band lug size: 5mm
Mass, movement + case + band: 30.6g
Dimensions, case: 38.7mm diameter x 9.3mm thick
Band lug size: 14mm
Mass, movement + case + band: 16.3g
Dimensions, case: 26.7mm diameter x 8mm thick
Band lug size: 8mm
Mass, movement + case + band: 16g
Dimensions, case: 17.5mmW / 20mmH diameter x 6.9mm thick
Band lug size: 9mm
There should be a screw on the loose end of the metal battery bracket. The band has been repaired with a plastic cord. I could remove a link and it would a continuous band again.
Mass, movement + case + band: 14.5mm
Band lug size: 16mm
Mass, movement + case + band: 75.93g
Dimensions, case: 34mm diameter x 6.5mm thick
Band lug size: < 6mm
The video explains the problem and the solution:
Mass, movement + case + band: 153.60g
Dimensions, case: 42.0mm diameter x 12.65mm thick
Band lug size: 22mm
Mass, movement + case + band: 111.62g
Dimensions, case: ~39.2mm diameter x 9.42mm thick
Band lug size: 10mm
Mass, movement + case + band: 122.95g
Dimensions, case: 36.75mm diameter x 9.02mm thick
Band lug size: NA
There was a variety of symptoms on this job. The Seiko had had some fogginess inside the case indicating possible water damage. The battery was indeed damaged and had leaked, but the watch worked with a new battery. The Timex was normal, not running, but had no battery in it at all. The Nautica’s second hand was keeping good time, but the second hand was jumping 2 seconds at a time instead of ticking normally one second at a time.
For all three, a new battery was all they needed.
Mass, movement + case + band: 59.84g
Dimensions, case: 42.33mm diameter x 8.40mm thick
Crystal diameter: ~36mm
Lug size: 20mm
Mass, movement + case: 41.31g
Dimensions, case: 38.85mm diameter x 9.08mm thick
Lug size: 20mm
Mass, movement + case + band: 65.00g
Dimensions, case: 38.85mm diameter x 12.77mm thick
Lug size: 20mm
Year Made: ~1980
Watch Model: Hamilton Masterpiece
Number on Case Back: 629467 inside and 980277 outside
Number on Movement: HAMILTON WATCH 760 on chip
Mass, movement + case + band: 55.56g
Dimensions, case: 35.08mm diameter x 11.46mm thick
Crystal diameter: 31.07 inside lip, 31.36 outside lip
Number on Case Back: 111309, MK-3131
Mass, movement + case + band: 147.5g
Dimensions, case: 38mm diameter x 13.58mm thick
Crystal diameter: 32.0mm
Band length:
Case-to-band lug size:
Band pin type / diameter / length:
Similar to above MK-3131
Number on Case Back:
Crystal diameter: 32.0mm
Band length:
Case-to-band lug size:
Band pin type / diameter / length: