Perhaps he would let you take a photo of it? I have had good results taking pictures of pictures once the proper lighting and reflections are controlled.
As mentioned: 55 had no portholes, 56 & 57 either way. This is also confirmed on page 28 of the Nov/Dec 2015 Early Bird. The fiberglass shell is the same, but latches, trim, weather stripping and headliners are a bit different through the years. Just a choice made when ordering like with or without back up lights for example.