Same watch - Different patina between hands and dial index possible?

[swingt]

Hello all

Have recently came across a vintage sub with different colours (patina) on hands and dial indexes...The seller insisted they are all original and the different patina are always possible under some different environment...

May I ask if it is common that the dial indexes and hands are of different level of patina? Hands are less yellowish than dial indexes in this case...

Thanks for your input an help!

Cheers