47-50 all had one piece glass and turn down handles.
51 was a one year only deal,they had vent glasses and turn down handles.
After that it was vent glass and push button handles.
As far as i'm aware you can transfer all the internals from an earlier door to the later but will obviously involve some metalwork to the glass openings.
Alternatively if you decided to change the doors completely to earlier ones there is a difference in the striker plates on the 'B' post of the later models to correspond with the push button handles.
Last edited by jockbolter50; 06/03/2012 8:08 AM.
