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The cracks in the tubes on the handles from that period are pretty common. It's actually pretty hard to find one without cracks. The teeth should not be bent, probably dropped at some point. You...

According to Gillette Date Codes for Double Edge Safety Razors and Blades it dates to 1924.

I think you are in the right timeframe. I think it went by different names depending on how it was packaged. I refer to mine like that as a Bostonian. Google Mr Razor, the best Gillette identity...