I thought most 3.5” 27-2s came with magnas, but I see many with targets.
What’s the skinny?
In September 1975 (Jinks, History of Smith & Wesson page 215), the factory began shipping all 27-2 (regardless of barrel length) with a Target Hammer, Target Trigger and Target Stocks. Prior to that time, the majority of them shipped with magnas. HOWEVER, regardless of the dash, including the pre-27s, many of the special order guns (rare barrel length, special finish or engraving) shipped with target stocks, and often times they were "presentation target stocks" - generally smooth from nice wood.
Hope that helps,