I just purchased my first Gem razors at what I thought was a great price. I’m still away and haven’t had time to clean them but did some initial research. I purchased a Micromatic Gen 1 clogproof which appears to be in excellent condition and a MMOC in what I thought was in excellent condition. After researching subsequent to the $10 purchase in the wild I found a stock picture with a center nub. Mine is flat. Can this razor be used?