Breitling Aerospace Avantage screwdriver

[EaglePilot]

Hi,

I tried to find on the internet/forums etc about information of which correct screwdriver size to use to open the caseback (6 slotted screws, and I dont want to damage it with wrong tool ) of the Breitling Aerospace Avantage (E79362) but couldn't find anywhere!
I want to change the battery myself, but surprisingly couldn't find anywhere information about the correct screwdriver size and type (normal or T shape) to use. The caseback slot screws seems to be really shallow in depth.
The same question about the correct screwdriver to open the 2 really tiny slotted screws on the inside battery cage!
Is there any good soul to help me?

[EaglePilot]

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[RW16610]

I'm not sure but wonder if a watchmaker could advise on the directive here. If that has already been attempted but yielded no results I guess contacting companies such as Bergeron to probe and determine if they've got the right tool for the job. Albeit annoying, each attempted stage should help uncover desired info.

Based on all you've done already thought one might have to try find out who makes the proprietary tool or how you could possibly get your hands on one. Even if it was costly, you would save over the years with battery changes.

Speaking of which, how long does a batter last in that watch?