1983 or so
With the serial number that you provided,your Smith and Wesson model 28-2 was made in the year 1973.
1967
Your Smith and Wesson model 10 was made between 1982-1983,with the 3 letter prefix to your serial number.
c.1982
Need to know caliber, barrel length, and type of action.
Late 80s
There are no available records to date a Dan Wesson by serial number. Value depends on the model you have. Watch Gunbroker.com .
Depending on condition the model 66 could be valued anywhere from $550-750.
The best that I can do is say that the smith and wesson model 28-2 was made by smith and wesson from 1961-1969.
80's or so
@ 1976
look inside cylinder well for model near rear of barrel in frame