Strap size

[smalleyboy]

At last I have secured my first Fortis. I'm thinking of getting a B42 Official Cosmonaut Chrono but until I can convince myself to part with the money, I picked this up on eBay. I would like to put it on a Nato strap but not sure what width I need. 18, 20 or 22mm?

Thanks.

[Mike 777]

20 mm.

[smalleyboy]

Mike,

Many thanks