What’s been stamped on the face of this specimen of RRC 378/1a? We saw a weird S very recently on this blog and in the land of twitter, but I don’t think this is the same…
Ideas welcome. Doesn’t look much like a test punch to me….
…
This is not an ‘S’ but it also doesn’t look like a test mark. The specimen is in Paris. Red is clearly a test punch. Blue might be a test gouge.
—
This is something different again but odd as well. Bad photo but seems Sigma shaped.