Bernhard Merkel's stamp was BEMESU (BErnhard MErkel SUhl). I have owned at least two in the past, and I think I sent a copy of an article published a year or so ago to you (Raimey) which someone I was corresponding with at Gebruder Merkel sent to me, and several months ahead of the same article being published in the GGCA periodical. I don't know why he would have used that well known and documented stamp and also have used just the two initials B.M. in a script style on other occasions. I'll bet that is something other than Bernhard Merkel, but I don't know what it might be.