While trolling EBay, I found a cheap price on a vintage Gillette. Looks like a Late 1930's (1938-41) Early Tech. According to our own Shave Wiki:
"Inside: underside: REG. U.S. PT. OFF. | [Gillette diamond] MADE IN U.S.A. Civilian models from before WWII show nickel plate, contract models show black plastic handle and/or black colored metal.
Look for Triangular holes in the safety guard. Prewar Civilian models often appear with "fat" handle type."
Kind of cool to have a pre-WWII razor in pristine condition. Got it for $11.00.
Looking forward to the shave.