Battery for Tissot Seastart 8980/990

[tboege]

I've got this Tissot SeaStar with 8980/990 marked on the back-plate.

Unfortunately, there is no battery. Can anybody help me to get knowledge about the correct battery so I can buy a new battery?

 

/Thomas

[watchweasol]

Hi Measure the depth and the width of the battery housing and then reference to the chart found on this site  https://www.watchbattery.co.uk/Replace-Battery-Find-Battery.shtml    this will guide you to the right size and type. Alternativle find the makers mark and caliber number of the movement and post it on the site or a good clear close up of the movement.

[JohnR725]

1 hour ago, watchweasol said:

Alternativle find the makers mark and caliber number of the movement and post it on the site or a good clear close up of the movement.

It looks like a ETA movement I just don't recognize the number right off the top of my head. I circled in the picture where the number should be

[tboege]

Thank you very much.

I have measure the battery housing to 9,5x2mm (9,5 was acually also printed on the batterycontact) - and by looking up in https://www.watchbattery.co.uk/Replace-Battery-Find-Battery.shtml i found the battery to be 370 or 371, which seems to be equivalent.

I have difficulties ies to read the eta-number, but it looks like 955 414  - and a search reveals  movements that looks similar to mine. They also seems to use battery 370.

 

Thank you very much for your help.

[watchweasol]

Hi  Just in case it fails to start up  I have attached the service sheet for the 955.419  which covers the 414,      cheers

6264_ETA 955.419.pdf

[tboege]

Thank you for the service sheet. Fortunately, that watch started up as soon as I added a new battery. I think I will have to practice before I can use all the information in the datasheet.

[watchweasol]

Not a problem  It was "Just incase of a non starter"  It may yet be usefull.