1982/1983 GPz mirrors.

 

So, these are mirrors for 1982 GPz1100, 1982 GPz750, 1982 KZ1000R1, 1983 KZ1000R2, and 1983/4 KZ1100R1. Part numbers are 56001-1125 and 56001-1126. When ordered, you can get either the ones with no lettering beneath the Kawasaki logo (on  left) or ones with lettering beneath the Kawasaki logo. I'm curious if anyone knows why there is this difference between these mirrors even with the same part number. Different manufacturer?