I bought a used bond SMP in excellent shape, but it looks to have a different 20mm spring bar on one side. The OEM one looks thicker and stringer while the aftermarket one is skinnier and has a tenancy to move a bit when I have my leather band attached to it. Does anyone have a link or know the model number of the spring bar I would need?
The information given by Archer is undoubtedly correct, however, I had it in my mind that the 2207 is for 19mm straps and 20mm bracelets with the 2208 being for 20mm straps. From Ofrei's site I believe the OME-03 is 2208 and the OME-04 is 2207 The 2208 is the one I'm using on my Speedmasters and I use it for both leather and metal straps, of course the 2531.80 is a different watch but its lug width is 20mm the same as the Speedmaster. http://forums.watchuseek.com/f20/ca...ences-b-w-ome-spring-bars-03-04-a-702332.html
The 2207 is for 20mm bracelets, and yes the 2208 is for 20mm straps. However the 2207 will fully seat in the lug holes, and the only real difference is the amount of spring pressure each bar places on the lugs. The only place I would insist on using the 2208 is if you are using a rubber strap, as they tend to "grip" the spring bars and try to pull them out if the strap is twisted, so using the longer one that provides more tension is a good idea. For a leather strap as shown the 2207 works fine. I have been wearing my Speedmaster for a long time on a leather strap with the 2207 bars - not a problem at all. Cheers, Al