Badley- from the Dan Wesson forum- hope this helps clear up a few of your questions.. this is for small frame only.
Jim

Models starting with a 7 are stainless guns.
Service models had fixed rear sights
Target models have adjustable rear sights
Small frame models

* 8-2 (.38 Special) Service
* 9-2 (.38 Special) Target
* 11 (357 Mag) Service Pork Chop
* 12 (357 Mag) Target Pork Chop
* 14 (357 Mag) Service Pork Chop
* 14-2 (.357 Mag) Service
* 15 (357 Mag) Target Pork Chop
* 14 (357 Mag) Service
* 15 (357 Mag) Target
* 15-2 (.357 Mag) Target

* 22 (22LR) Target
* 22M (.22 Win. Mag) Target
* 32 (32 H&R Mag)
* 3220 (32-20 Winchester)
* 708 (.38 Special) Service
* 709 (.38 Special) Target
* 714 (.357 Mag) Service
* 715 (.357 Mag) Target
* 722 (.22 Long Rifle) Target
* 722M (.22 Win. Mag) Target
* 732 (32 H&R Mag) stainless
* 73220 (32-20 Winchester) stainless
* 738P (38Sp +P)

Other Interesting Information

The most common small frame guns are the model 15 and 15-2, the thought is the -2 guns have minor differences when Monson started manufacturing the guns and labeled it the -2. One of the changes noted is shape of the hammer.

When Bob Serva bought the Dan Wesson company and moved it to Norwich NY, he retooled the shop with all new CNC machines and the first guns he produced were marked "First issue" they went back to labeling the model 15 and 715 dropping the -2.