The CS-1 stamped on the frame identifies it as product code 104229. It was part of a special order made for the U.S. Customs Service in 1988. Besides the CS-1 stamp, they had a 4" barrel, pinned black front sight, round butt and dull grey bead blast finish. There was also a 3" version, product code 104228.
The "2M" stamp means the gun had the bushing recall done before it was shipped.
These guns also sale for a premium.
Last edited by laytonj1; February 25, 2010 at 01:45 PM.
Reason: more info