You can get a manual for free on the S&W web site.
The Smith and Wesson model 27-2 denotes that there was a second engineering change to the original model 27.The second change indicates that Smith and Wesson changed the cylinder stop,and eliminated the trigger guard screw.
27 years old
Less refined version of the Model 27.
what is the value of smith and Wesson model 27-2 N479279 6" barrel nickel plated never fired
100-1000 usd
N frame 357 Magnum
1961-82.
@ 1988
19 and 27
100-700 USD
No tirggerguard screw is the main one.
The Sn you list does not fall in the range of the Model 27