This Ziegler variation shows the name "Albert" dropped in favor of the first initial "A". While this mark is also on the blade's obverse ricasso, the direction of the logo is along the blade's length. Sadly this example is not dual marked, it is a long model with nonmagnetic pommel. I used to see these on Eban years back, not too much anymore.

Zipperhead.JPG (95.58 KB, 487 downloads)

GDC Gold Badge #290
GDC Silver Badge #310