Hi Bigi,
Really interesting piece. Since S&W didn't change the dash number when they stopped pinning barrels, but this happened at about the same time (1982) that they stopped recessing the cylinders ("eliminate cylinder counterbore") one simple doesn't expect to see a non-pinned barrel on a recessed cylinder Model 27-2. IMHO, since it's the recessed cylinder that differentiates the -2 from the -3, and you have a recessed cylinder, you have a -2 that's later than most anyone would expect to see one, and that's pretty cool. Congrats!