LOL what an absolutely pointless rebuttal, we're talking about the 5711/1A on a leather strap, they don't even make after market leather/rubber straps for the 5711/1A. For sure a sub with a nato, leather or whatever strap is fine, there are tons of after market straps for these, we're talking apples and oranges here.
Do a google search and look for 5711/1A on a leather/rubber strap see what you come up with. I'll apologize if you can find one that isn't a rep.
Unless you're telling me someone is willing to go through the trouble of custom making a steel strap for a gen 5711/1A which includes the manufacturing of the first link to fit the lugs. Or they've placed their gen 5711/1A dial into a gen 5711G case to fit the leather strap. Both of these possibilities are laughable at best. If you're gonna go for something like this why not remove every trace of the steel bracelet and just go straight nato?
Like I previously stated, my whole initial response was predicated on the fact that he wanted to know how "to gen" the dial color was, if you care that much about the "to gen"ness, why would you ever opt for a 5711/1A with a leather strap?