Hello!
I got recently this strap for my 305. It is a 26/26mm. The size of the buckle makes it look like a belt!
And i also included a picture with some of my other big watches just to get a size comparison.
Excuse me for the poor quality of the pictures but the intention was good
and you werenetr mistaken at all when you said it looks a bit like a belt, but a beautiful one though
Thanks for sharing.
Faisal
The buckle of the 312 is quite big but compared to the one on the 305 it seems small