Postby blakstone » Mon Feb 17, 2020 8:31 pm
The "différent" and mint mark are the same thing: a device (astronomical symbol, archaic letter, etc.) unique to each assay office. This mark is placed under the chin in the first standard Minerva and in front of the forehead of the second standard Minerva. It's absence indicates the Paris assay office.
The English translation of Tardy is a bit clumsy. If you omit the parenthetical "(Nos. 1 and 2)" the sentence reads: "the mint-mark is placed under the chin for the first Standard, near the forehead for the second Standard" which is correct. I think the "(Nos. 1 and 2)" means "(in the first and second standards)".
I still think it is very clearly "BN", and I note that there is maker in Lyon (the second-largest French silver-producing city after Paris) Berger - Nesme, whose mark was "BN" with a chalice, used 1889-1924. The différent/mint-mark for Lyon was an Arabic medial "m", which looks (in French marks, anyway) like a tiny lozenge with two long lines sticking each side.