fred.zueri
·True, but for a FOIS or trilogy 60th anniversary speedy with 19mm lugs the 16mm clasp is the way to go. As most straps will be 19/16 in that case.
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An 18mm clasp for a Speedmaster is far more flexible than a 16mm. Looks and feels better, too. We live in 2020, not 1970.
For 20mm lugs I suggest an 18mm clasp and for 19mm lugs go for the 16mm, to give you the most options possible for straps.
For the 16mm, I think go for the new shield/trident style as it looks bigger than the older rounded style.
Ref 025STZ007387
For the 18mm, if you want all brushed it will be the older rounded style.
Ref 94521833
The new shield/trident style to me looks better but also looks bigger.
Ref 94521883
I have all three of the above clasps mentioned too btw.