I bought an US1171 for my Speedy and was disappointed with it. It’s a decent bracelet (specifically for the price) but the quality of it compared to the watch it was strapping to my wrist just felt lacking.
So, I bought the modern OEM 1171 for ~$450usd in hopes it would at least feel a little better. Right out of the omega packaging I was disappointed with it. It felt
exactly like the US bracelet in just about every way. It seemed like the biggest and only difference between the two was the Omega signed clasp.
If you’re set on the US1171, save yourself money and just buy that one. However, there are better bracelet options out there in both aftermarket and OEM. It just depends on how much you are willing to spend.
For what it’s worth, I’ve had the Forstners 1450 w/milled clasp on my speedy for over a year and have been happy with it.