Caseback outside

Inside of caseback

My post was under moderation, I'm now sending more pics,

sorry about flooding, there will be 3 messages for 3 pics.

Edit, we don't see it on my pictures, but the crown is signed.

Hello, I got this JLC. I think it is the caliber bumper 476 and would like to have more information about it. The watch should be unserviced, so I will have to find someone to do it. For its use, does it look that some part were/needs to be changed, is it splash proof ? When opening it, I saw that t...