Hello R.J., Tom, Mike, Aggie, Etex:
Some of these solid-based Greenes are also to be found in the Shenandoah Valley. I have a fired example from that location. Here is my note for the specimen:
.54 (.53) caliber, Greene rifle, flat base, no grooves, rifling marks evident,
fired from a carbine with five lands and grooves (according to
Reilly’s United States Military Small Arms, 1816-1865, the U.S. made
Greene carbine had five--per M&M, so did a .54 Starr, .54 Burnside,
.54 Ballard, or a .52 Terry carbine [.54 per M&M] English breech
loader). According to "Flayderman’s Guide to Antique American
Firearms . . .," (8th Ed., pp. 510-511) some .54 Greene Carbines
produced by the Massachusetts Arms Co. made it into the hands of
the 6th Ohio Cavalry, and the 6th did operate in the Shenandoah
Valley, U.S.A., T&T 93, Shenandoah Valley, Virginia.