[mikethedruid]

Something nobody seems to have noticed, in your inside cabinet picture showing the chassis, look at the tube layout sticker on the side of the cabinet. I don't know about anyone else, but I have never seen an original sticker that is THAT white. They used an acid paper which yellows over time, and every original one I have seen has gone much browner than that one. Also, look at the cabinet. It looks VERY good. It is my bet that someone has put a 645 chassis into another cabinet, made a replacement sticker, and put it in over the original sticker, or maybe removed the original first. The chassis DOES look like a 645, but the cabinet does not. Looking at the various cabinets from 1936, it looks like a 630B cabinet. It also looks like someone replaced the vertical piece on the left side of the front, since it seems to be missing the fluting on the right, which it should have. Also, note the fluting is even at the top edge, whereas the fluting on the 640B, 645B and 650B are higher toward the center of the radio, and less as you go outward. See the pictures in the gallery for the cabinet, and here:  https://www.radiomuseum.org/r/philco_645.html    for the chassis.