Bf109A,B,C,D in Legion Condor

[PMoz99]

Hello Sidney. Thanks for the photos and the assistance.
Unfortunately, I'm afraid I'm not aware of the minor detail differences between the variants to be able to tell the difference, and the photo quality is also a hurdle.
I know the B series had wooden, then retrofitted metal 2 bladed props, and the C introduced wing guns, but otherwise .........
I think the captions on some photos are also erroneous. I have a photo of 6o32 in the Osprey book on the A-D series and they say it's a D.
You mentioned that the D had the electrical socket on the starboard side under the cockpit before, but it's difficult to see in many of the photos. Was the socket provision on the port side retained as well? I ask because I'm pretty sure I've seen photos captioned D with a socket on the port side.
Peter