Adjusting a strap on a speedmaster 3891.50

londoncolin · Nov 9, 2020

Good afternoon all. Sorry to bother with an embarrassing admission, but I cannot work out how to adjust the strap on my latest purchase (1994 limited edition Speedie). I have attached a few pics and would really appreciate some help. Usually I would nip down to my local watchmaker but I live in London......

wcook2000 · Oct 19, 2025

5 years later 😀 Obviously you figured this out by now. But for the next person who comes across this. From what I have seen, you have to depress both sides of the clasp underneath and push them through to separate it from the top part of the clasp. There is no swinging arm. It's a little tricky but once you have done it once, you will get the hang of it. Use something that won't scratch the button or the clasp as it will be easy to do.

Adjusting a strap on a speedmaster 3891.50

londoncolin

wcook2000

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