I was at the New England Air Museum on Sunday, June 15 doing a couple of speaking presentations so I took the opportunity to take a close look at the starboard side of the Electra in the area where the window/patch was on NR16020. I taped off the area outline of the patch as best I could and had a volunteer hold the artifact up to the airplane. (see photo) I later used the tape as the basis for an overlay (also attached). These are rough approximations, not meticulous measurements, but it's clear that the artifact fits within the dimensions of the patch, albeit fairly tightly which, in itself, may be significant.
I was struck by how low to the ground the window/patch is when you're standing beside the airplane and how small and cramped the "lavatory" room is.