M120716a
Crown flanked by "K G", crossed swords, "ROG MAR" above "P V B", plus "MARKTREDWITZ" and "GERMANY".
(Picture: Brigitte Tait)
Before you start wondering what "ROG MAR" stands for, the letters "P V B" have been mentioned whilst dealing with another unidentified mark: M150815. Some people now assume that these marks are of post-WW2 Italian origin (it's a long story).
M120716a
Crown flanked by "K G", crossed swords, "ROG MAR" above "P V B", plus "MARKTREDWITZ" and "GERMANY".
(Picture: Brigitte Tait)