Curious if anyone has tried to make this happen and if it’s possible. I’ve seen the at rubber strap on a speedmaster before.

i think the denim railmaster would look good with a factory rubber strap.

 

I have asked around a few times and I have been told it would not fit related to the metal inserts. I was hoping it would. However, I did come across a strap made to fit for the modern railmaster. Zealande straps. Check them out.