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The razor itself isn't stamped with any date; I'm going by the photo of trademarks posted by manah a few posts up.
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But according to the pic of trademarks above, 0livia and I have C. Frederich Ern razors (c. 1896) later replaced by the Eagle and Snake trademark (1897)?

Non plus ultra is perplexing though...

When you say "of that time" what time is that roughly?

This is exactly the razor I have!

I just picked up a razor with the 1896 logo etched on the blade. Spanish point. Tang has two lines stamped:

Non plus ultra
Made in Germany

Anyone with more info? Manah, do you have a book...