As Alan stated you have an early .22 built on the K frame referred to as an Outdoorsmen's. Prior to this, the big .22 revolver was the .22/.32 HFT which was a .22 built on the I frame normally reserved for the larger .32 caliber guns.
When S&W decided to build a .22 on the K frame, it pretty much killed the sales of the .22/.32 HFT and most of the .22/.32's built thereafter were a 4" barreled gun referred to by S&W as the "kit" gun.
Joseph,
You have an early K22 outdoorsman. . Manufacture began on these in Jan 1931 with SN 632132. I have two, SN 633xxx and 639XXX both shipped in 1931 and the one you are considering is most likely 1931.
Value is dependent on condition. I've seen very nice ones in this period go for 1000+.