Sicura Diver Compressor Super waterproof 400 Vacum tested

Dear All,

First of all Merry Christmas to everyone.

I would like to know if anyone could give me some information regarding the watch below.

Especially i would like to know how to set it up and eventually where to find some manuals regarding it.

Also i noticed that on the lower crown there is a kind of button that i would like to know what will do.

thanks in advance to anyone can give me any input.

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