Omega bracelet 1570/870 help

I bought this item for my Speedmaster: http://www.ebay.com/itm/221992789622.

It seems authentic for me, but after some research I didn't find any sources that 1570/870 bracelet was actually used in Speedmasters.

The bracelet clasp says 1570/870 (which has been used in Omega Dynamic), but links aren't similar as 1570/870 usually has - although links seems authentic also. End links are 842, so they should fit to Speedmaster without any issues.

Could it be some authentic Speedmaster bracelet with Omega Dynamic's clasp, what do you think?

Why would a Dynamic clasp have Speedmaster on it, unless there was a prototype Dynamic Speedmaster that has eluded us all for years?

Oh, I forgot that Speedmaster text on it =) This is strange one... I'll get the bracelet tomorrow and then I'll have more info about it.

Bracelet and refund of it received, everything's ok now. Bracelet fits and looks ok, I paid 75 USD for this frankenbracelet.