I'm wondering about that drawer in the Right side speaker compartment. Is the slide mounted internally or just on the front. Also there is a board just above it that looks like a separator plate. If that drawer is stock, then there's no way that a 15" with an 8" mid and 2 3-1/2 tweeters would fit in the front. Maybe a Horn mid and a Horn tweeter with a 15" like a 56', 57', or 58'. In 59' they changed to the cone mid and 2 tweeters per side. Carter isn't sure about the speaker configuration(whether front or down firing) but the 1956 and 1957 models have 2 woofers (15") 2 Horn type Mids and 2 horn type tweeters, but he did read somewhere that the speakers might have been Altec's. If you have the front bezel behind the grilles for the speakers they would tell the story. Also is there a mounting board for the tuner preamp handy that came with the unit (or the front bezel?). The Front Bezel would tell us whether it was a 57/58 or a 59 to 61. I'm still NOT convinced it's a 59' to 61'. Can you find any Ink Stamped info on the cabinet anywhere on the inside or the bottom. 1956 President (Late 56 model year catalog) 1957 1958 1959 Mid Season (1960) 60 and 61 same.