Here we have a Smith & Wesson Model 19-5, circa 1988, in a very uncommon configuration: A 4" barrel with a factory round butt frame. The 4" RB configuration and AYY serial number prefix matches the one used for the 680 guns shipped to the U.S. Department of State in March of '88.
With a 4" barrel and a round butt, it can be carried concealed IWB or OWB without too much trouble, provided care is taken with holster selection. Being able to handle a range of cartridges from .38 Special shotshells all the way to 158gr .357 Magnum loads (I'd avoid some of the more esoteric heavy hunting loads in a K-frame) makes it extremely versatile.
There aren't a lot of problems a competent shooter couldn't solve with this thing.
.
