Here's an old post from 2003 that may help...
I have kludged together what I think to be descriptive of the older .357 models based on the Blue Book of Gun Values, the writeup on old build revolvers on the new wesson web site, a Palmer catalog and examination of my collection.
I'm not sure, hoever, when or if the model 15 became model 15-2. I did not include the .38 special models 8 and 9. Any coomments, additions or corrections welcome
WESSON FIREARMS CO. INC.
Previous manufacturer located in Palmer, MA 1992-95. Previously located in Monson, MA until 1992. In late 1990, ownership of Dan Wesson Arms changed (within the family), and the new company was renamed Wesson Firearms Co., Inc.
MODEL 11
- .357 Mag. cal., 6 shot, service revolver, 2 ½, 4, or 6 in. interchangeable barrels with pork chop shroud, fixed sights, blue, interchangeable grips, external, exposed barrel nut. Mfg. 1970-71 only. Monson. Early models manufactured by High Standard???
MODEL 12
- similar to Model 11, target model with adj. Sights, exposed or recessed barrel nut.
Mfg. 1970-71 only Monson. Early models manufactured by High Standard??
MODEL 14
- Service revolver, similar to Model 11, with recessed (slotted for spanner type wrench) barrel nut. Mfg. 1971-75. Monson.
MODEL 15
- Target model, similar to Model 14, with adj. Sights, recessed barrel nut. Mfg. 1971-75. Monson.
MODEL 14
- .357 Mag. cal. Service revolver, 2½, 4, 6, or 8 (disc. 1994) in. inter changeable barrels, fixed sights, blue.
Mfg. 1975-95. Palmer.
MODEL 15
- similar to Model 14, except adj. sights, available with 2, 4, 6, 8, 10, 12, or 15 in. barrels.
Mfg. 1975-1995. Palmer.
DAN WESSON FIREARMS
Currently manufactured by New York International Corp. (NYI) located in Norwich, NY beginning 1997.