Hello billyvan
Here is a few I could do with - manufacturer and mag marking:
Inland Division of General Motors... II KI [inverted] II [circled]
C. Cowles & Co. .... C
Saginaw Steering Divison of G.M .... . KSG S'G' OI-S'G' G- S'G' SP-S'G'
more Saginaw codes... U-S'G' O-SG K-S'G' ISG KSG (inverted)
IBM ....SY-B OI-B OI B
Irwin Pedersen ... K-IP I-P-K IP-I C-IP UP
National Postal Meter ... UN MN
Quality Hardware ... UQ QU G-Q
Rock-Ola ... IR R-C RO RC R-G UR
Rugg Mfg. Co. (Greenfield, MA.) ... RUGG
Seymour Smith .... SS SS-4 R-SS
Standard Products ....SO
Stanley Works ... SW
Underwood ... LU UU IU [circled]
Wade Electric Products ... WEP [in curved type]
Winchester... BW UW IW [circled]
No worries if you havent got all of them!!!
Thanks Todd