As for identification, it seems the early ones had the light green wrinkle finish, a bicycle type grip, and cast lever arms painted with the same light green wrinkle finish. The RC 2' had a darker color hammer tone paint, a ball handle. and steel linkage arms that were black oxide finish. There were also variations on the early ones with the linkage pins. It seem there were a couple of variations with the pins, some having press fit pins, and some having a c-clip to hold them.
I am also led to believe some had a bolt and nut, though I have not seen that myself.
The casting, itself, does not seem to have changed except for the RC logo has turned to RC-11.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |