Mirrors for '65 C10

[mp8200]

Hi all
My '65 Std trim Truck is mounted with two slightly different door mirrors. Can anyone tell me which one is the original style?

 

[drabo]

As far as I know it's the one on the right.

 

[markeb01]

The one on the left has the offset mirror head that was original to 1960 trucks. The earliest versions in this series of trucks also used a one piece cast arm, instead of the common 2 piece tubular type. I don't know when the offset head and cast arm were discontinued. They may have continued for a couple of years, but I've never seen one on anything but a 1960 model.