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If it doesn't have a tail and it has straight scales with no curve it is likely late 1700s to early 1800s. No distinct tang would be earlier than later as well. Here is manah's website which is great...

I've had a couple of them over the years and they do go way back. Stub tailed shavers. There may be some in that razor club here. If not Manah will probably be able to tell you more on their history.