Roy: here's an 1881 Folsom catalog when they were at 30 Warren St.
In 1889 at 15 Murray St.
In 1893 when they acquired Crescent, they were on Broadway. This is from 1905 courtesy of Researcher.
Do you have a catalog listing the Wm. Moore & Co. percussion double and thanks?
More here
http://docs.google.com/a/damascusknowled...uSXXQ&pli=1BTW: PeteM's list of Belgian maker's/trademarks lists 'JV' as J. Van Dalem, but the littlegun site doesn't have any infro
Joseph Vandalem de Chaudfontaine was a barrel maker and member of
Syndicat des Fabricants de Canons de Fusil de la Vesdre If that is a 'Crown over JJ', it could be Joseph Joiris of Nessonvaux.