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I recently acquired my first Philco 90 cathedral and began work on the chassis. It is an early model with 2 push pull 45 tubes. Later I was cleaning the cabinet and on the bottom, along with a few other marks and scuffs, I noticed a rubber stamped date- MAY 31. It is very faint but once you see it there is no mistaking what it says. I have read that the 90 cathedral began production in June 1931. Is it possible I have one the very first ones made? The serial number is 111835. Just one of the many things that keep me awake at night.
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