Please help ID these Diaphragms from JBL CD

[Champster]

I just bought 4 2425 1" Compression Drivers and I definitely need to change at least one of the diaphragms and I want them all to be the same. These 3 pictured all work fine, but there aren't any markings on them to tell me who made them. Can you help me identify them as JBL or aftermarket?

Thanks,
Paul