[lugerholsterrepair]

Mike, The differences are hard to just tell...it's a little more complicated than that. Hell I'll give it a try.
The box that incloses the B90 is a simple box on the G date. The numerals, 9 & 0 are square bottomed. On later G dates, the S91 this all changes!
On the K date there are little wings flaring off on all 4 corners of the box and the numerals are rounded.
It really is a bit complicated and page 161 of The World of Lugers is a must!
Let me know your snail mail address and I can shoot you a copy unless someone here knows how to post it?

It appears that the tool I have, a W154 is a G date and the 1934 holster I aquired is for a G or a K date pistol.

Jerry Burney