Germany 3n1 Error Maybe?

I tried duckduckgo, here and Scott but do not see any listing for this as a known error. Just a one off ink blob on the top left "1" or listed somewhere I did not find?
Thanks for looking and commenting.

Wheelman, it may be Michel #16 PF X, sheet position 60 (plate flaw #10), which is the damaged left "1". Although Michel lists this plate flaw, they do not illustrate it. So, I cannot confirm that this is a plate flaw/constant variety because I do not have a specialized catalog for this series of stamps. Perhaps another SCF Germany specialist can give you a definite answer.

Any attempt to collect a specialized collection of Germany using Scott catalog as a reference would be very difficult to impossible.

This seemingly simple issue has been heavily studied. The Michel Sepcialized requires 14 pages to cover it. For even more detailed information there is a study group that publishes multiple guides:
https://www.arge-am-post.de/index.html

Hi,

Looks like a foreign object during printing (Normal after war)

Here Nr.16 X Position 60.

Best regards

Hornet