WeymannWeymann banjo label 1864-1940s H.A. Weymann & Sons, was distributor in Philadelphia.  Guitars were made by themselves, Regal, Vega. [Source: 2010 Official Vintage Guitar Magazine Price Guide ]

H.A. Weymann & Son, Incorporated was established in 1864 in Philadelphia. Later, it incorporated as the Weymann Company in 1904, and distributed numerous guitar models that ranged from entry level student up to fine quality. Other trademarks may include Weymann, Keystone State, W & S, and Varsity. [Source: eBay]

Weymann and Son Guitar Catalog Scan

Harmony http://harmony.demont.net/brands.php

http://www.banjoukes.com/Manufacturers/Weymann/Weymann.html

Image left Gruhn, below Weyman guitar serial number from the 1920s ebay