hi,
the vintage 1970s monacos have the 16mm buckles,
the new monacos, the reeditions have the 18mm.
...maybe you have seen the perforated nos heuer monaco strap listed currently on ebay
best,
ralf

: Hi,

: I am thinking of having a perforated strap made
: by Banda for my vintage Monaco. Can anybody
: with an original strap for their Monaco tell
: me what size the buckle is (18mm?).

: Thanks,
: Ian