1917 Proofs

[kurusu]

Originally Posted by Edward Tinker

I am sorry, I have never heard of an RC marking on modifications - I have seen where it is crown marked

The thread you shared talks about acceptance stamps

This is not just a crown, I think
1913 7932 3.jpg

[DonVoigt]

Originally Posted by kurusu

This is not just a crown, I think
Attachment 56622

No, not just a crown, but a crown over a letter, tough to call on these small ones, C/G or C/C or C/some other letter; but they are all Crown over something- as is typical of the small Erfurt acceptance.

I'm sure that is what Ed meant, C/something, not RC/Crown/something.