Pic one is an 81XX serial SM with a 1503/825 bracelet. The links connected to the case are engraved with "825". Pic two is a bracelet from an 85XX serial SM with a 1503/825 bracelet that does not have the "825" etched into the case-end links. Also, this bracelet feels "flimsy" when compared to the 81XX bracelet. Is this cause for concern? or is this a product of the newer model Seamasters? Would the lack of friction collars in the bracelet create a "flimsy feel"? I have verified that the 81XX bracelet has collars, I don't have the tools in hand to inspect the 85XX bracelet.