I think maybe it's because you can't remember what a new C64 looks like? All of the ones still around today must be pretty grubby by now and maybe you didn't realize that the shiny look with all that gloss is actually how they looked new 
The colour probably is slightly off because it's more brown less grey than a sealed music maker keyboard I compared it to ipso facto a c64 case not exposed to light for 30 years
