A.B. more than likely points to August Blatt of Albrechts and I believe those initials are seen on several of Josef Jakob's offerings. JW is Julius W, Wolf, etc. Frank Kuhn either sourced from Josef Jakob or he was of the many, many retailers sourcing from the very large umbrella of Schoverling, Daly & Gales.

http://www.doublegunshop.com/forums/ubbt...true#Post235112

Cheers,

Raimey
rse