Here's a knife I've had for a while. It's marked "Rob. Muller, Merscheid- Solingen". Seems to have been cleaned and polished, but has a steel hilt, nickel rivets, a diamond that wiggles, a nice blued scabbard, though the hanger is "lost to time", as the dealers say. No sign of a motto. Sorry photos not the best, at the limit of my camera's powers. Robert Muller also produced under the M7/32 code but they are not that common. Seems they lost their RZM contract at some point.
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