Perforated Straps... What would be the most desirable sizes?

I was contacted by a strap maker who is interested in producing a batch of 200 perforated straps with vintage Heuer and other chronos in mind.

"To the best of my knowledge most of these watches took 19 and 20mm straps. Can you confirm this, Chuck?"

To my knowledge, the Original 1964 Carrera and the re-issues take 18mm, the Autavia 12's from the 1960's take 19mm, the Autavia GMT (v.724) takes a 20mm, my Autavia 7736 Cushion case takes a 20mm, my Gray PVD Autavia Micro-Rotor takes a 21mm, etc. I know most Speedmaster moonwatches take either 19mm or 20mm.

Eventually I'd like to create a table/database for Heuers, like my Omega Chronograph dimension tables (see link).

So what sizes would be most attractive/useful to you?

Who knows? With enough response perhaps they will increase the production run!

-- Chuck