Sorry I am late, working in the yard today and could not (should not) wear a watch until this evening. Out on the back deck.
As I was trying out different straps with my PO 42mm, I found that I really like a NATO strap of this color scheme (i.e., black and dark red stripes) because it matches the color scheme of the dial. This particular NATO strap is not a genuine Omega strap. But I replaced the thin, plain-looking original buckle with a genuine Omega buckle, so it wouldn't look too cheesy. Since Omega offers a NATO of this exact color scheme, I may eventually get it from them. My only issues with the Omega NATO strap are that their nylon fabric is somewhat thin and bit too shiny and that it is about 1.5mm too long to my liking. So I will see....