These are an older style. Please note where your shoulder straps are attached. Some generations the straps are attached to the cummerbund and others the vest. The one with the strap is one side only

The cummerbund with shoulder straps will not match to every Zeagle shoulder buckle. There are many versions over the years. This one has a thicker middle part on the male buckle. The male part is 1 5/8 inch wide and the wide middle part is 3/8 of an inch thick.