Here are 2 original  equipment mirrors that are in nice  condition .   They are different colors  and I have labled what I think they are from, but you decide what they are.   They may be from 51-2  ???     $24 ea.      The chrome  one I think is for 1950-52  Belair models   $28   for this one.    I beleive these where Dealer  take offs   when the accessory mirrors where installed . I have a box full of them out of a dealership.