Possibly
MUCKE-PICKE (1902, no. 55418): Ernst Paul Lehmann, Brandenburg a.H. Registry class: 9b. Style: block.
MUK: Gebrüder GrahMULCUTO:
Paul Müller & Co
MULCUTODIAMON: Paul Müller & Co
From
http://www.archivingindustry.com/cut...lermarks-1.pdf
and from John Walters German Bladesmiths
Cheers
GC