Fixing a buckle on an Seamaster Professional 300m

Not sure what watch or bracelet you are specifically referring to.

The Bond era SMP’s have a clasp spring that occasionally needs replacement, and if it snaps the buttons on the clasp will open too easily.

That is a different problem than the dive extension, so if you can let me know what bracelet you have I’ll try to help.

Cheers, Al

For future reference the spring for this clasp is 085ST0055. It's very easy to change, and I've seen many watch owners do it themselves.

Did they fix the dive extension? When these pop apart too easily, they can be tightened, and there are 2 methods. One is to stick a screwdriver between the two parts here at the red arrow, and give the screwdriver a twist or pry to spread the two sections apart:


I'm not personally a fan of that, and I usually use a staking set to redo the small punch marks that provide the grip on these two parts:



Just a light tap on each dimple is enough to tighten the extension:



Cheers, Al