I got a really nice yellow GL100 on fleebay for a bargain. Said battery replacement was needed. Watch looked like in the picture, no scratches no nothing. Band had to be replaced since it was a velcro(cloth?) band. Got the band and new battery before I opened it

Battery acid had leaked on to the module.. no way it was even close to be able to repair the module. Luckily it staid witihin the module so nothing else got damaged.

What does our experts say about this module? Was it used in any other Gs than the GL100?

All suggestions welcome