10
Final Update: Just heard back from Turnbull, and they have records to support that all 50-75 of the San Juan Hill guns for USFA were Case Hardened and Charcoal Blued at their facility.
Here is what we know for whomever comes across another one of these:
Replica of the Louis G. Bishop, Rough Rider Colt held in the National Firearms Museum
Black Powder, Case Hardened Frame. Charcoal Blued barrel with 5 1/2" barrel, chambered in 45 Colt
D.F.C inspection marks on underside of barrel and on frame, above frame serial#. Also a P proof mark on underside of barrel
OCH (Odus C Horney) Cartouche on left grip panel with 1901 over the top of it
RAC (Rinaldo A. Carr) Cartouche on right grip with a small R.A.C stamped on bottom of grip
Frame stamped "US" next to Patent dates
Cylinder stamped in 3 places, (8222, R.A.C, and P)
Grip serial# 119276
Trigger serial# 93910 with a G beneath it
Frame serial# NFM###
Total Build: 50-75 pieces
Turnbull finished all pieces
Build was commissioned by the National Firearms Museum in 1998, through USFA for a limited run to be sold exclusively through Cherry's.