I am a new owner of a 3573.50 and I am struggling to find a comfortable strap to wear. I have the original and a couple of others but can't find the best. I know that it is all subjective and not everyone will have the same opinion, but I would like to hear what you wear.
I consider this Bulang & Sons strap as one of the most comfortable I have, mainly because of its light and soft material...
I have that one, too, and I will second that opinion! ... although, I do believe there are others that are just as comfortable, and less expensive (<$125).. YES!
Options include those being sold here including on the FS area by Jankoxx https://omegaforums.net/threads/hand-made-watch-straps-horween-others.58477/
Believe it or not, the two most comfortable straps [following some wear] that I own are constructed of nylon/velcro materials...the first one [first and second pics below] being the Omega replica NASA strap that came with my Speedy Gonzales Moonwatch and the second one [third and fourth pics below] being an unknown/non-branded strap that was a gift from OF member @ChuckMK23.