I've had these revenue stamps set aside for quite a long time, waiting for an opportunity to determine the perfins. Most are stock transfer stamps, with a couple of documentary stamps. I like doing the research myself, but I don't have access to a comprehensive perfin catalog. (I'm not ready to shell out $88 for The Perfins Club's Catalog of United States Perfins just yet.) I hope a SCF member will indulge me and identify the perfins. Here they are (the images have manipulated so that the perfins will read normally):
AC & Co

AJ & Co

CC & Co

CM & Co

CML & Co

DHS & Co

DW & Co

EAP & Co

G & Co.

GT

H & W

HUC

J & Co

J & D

P & F

R & ... Co

S & Co

T & McK

... & Co
(The first letter could be an E or L, the second letter an F or P, the third letter an H or M.)

Thank you very much for your help.
Cheers, Robert