Changeling
Since this has been asked several times in the past few days I had to look it up.
Per Supica & Nahas:"Standard Catalog of Smith & Wesson" and personal conversations with S&W customer service. There is a group of changes which were made internally and externally which are collectively referred to the Endurance Package. These are identified by the "dash" number, I.E. -2, -3, etc.
These first "dash" numbers identifying these changes are identified thus:
All of these changes occurred aprox. 1988
Blue guns;
Model 25-6 and following (-7, -8, etc.)
Model 27-4 and following
Model 29-2E and following
Model 57-2 and following
Stainless guns;
Model 624-1 and following
Model 625-2 " "
Model 627- all
Model 629-2E " "
Model 657-1 " "
Model 681-1 " "
Model 686-1 " "
Hope this answers your question.
(Edited by Alk8944 at 7:40 pm on Jan. 4, 2002)