I hadn't considered that... I'll have to measure it at home and see what Forstner customer service says.
here she is on a ... VINTAGE JB Champion USA NASA bracelet .... whose max spread / width is 19mm .............. the bracelet is NOT a komfit reproduction
I have over 20 watches, mostly new(ish) models but this Seiko is my "best" watch.
My grandad used this watch from new back in 1984 up until 2013 when the display gave out. I always had a fascination with this watch as I'd see it on his wrist nearly every single day and due to the colour scheme it always stood out more than traditional styles like the Casio versions.
I recently acquired this one in immaculate condition, even the bracelet is like new.