Below is a partial list of trade goods from an invoice of merchandise shipped on board S.B. Diana C.M. Halstead Master bound for the upper Missouri River and consigned for account and risk of upper Missouri outfit 1835 under mark in the margin,.....
50 dz Bright oval fire steels
3 dz iron tablespoons
3 dz iron teaspoons
3 screw plates
24 bunches black barly corn heads
25 bunches red barly corn heads
1115 1/2 lb blue pound beads
758 lb chalk white beads
80 lb black white beads
205 lb yellow - 285 pound
256 lb ruby white beads
150 lb deep blue pound beads in bunches of 2 lb each
358 lb black pound beads
100 N.W. guns 30 to 42 inches
2 pr Octagon Brass barrel pistols
10 pr plain iron barrel pistols
1 pr super twist barrel pistols
50 battle axes
20 gro hunters clay pipes
12 dz patent blk ears ea B
2 packs tinned rivets 1"
2 packs tinned rivets 1 1/2"
1 pack tinned rivets 2"
2 copper soldering irons
25 @ tin ( ? ) best solder
..... you'll notice the lack of description pertaining to RH or LH locks on the N.W. guns, yet the guns were described as being readily available with 30" to 42" barrels.
Personally,.... the lack of choice regarding locks, leads me to believe they were available with RH locks only.
Other research regarding N.W. guns, have shown similar results, except occasionally we see this particular type of gun had a stated (western fur trade) value of $4.50 @ during the 1820's-30's.