I did a little reading I'd somehow missed before, and found

why that Grail Gun of mine is so hard to find as I'd like it:
Also known as "K-32" until 1957. Identical in appearance to the Model 14, except chambered for .32 S&W. Model 16 did not enjoy the commercial popularity like the Model 14 and was dropped from the line in 1973. Only 3,630 K-32s/Model 16s were sold between 1947-1973. Reintroduced in 1990 in .32 Magnum; discontinued 1993. Note: Add 25% for 1946-1957 production (no Model 16 marking). Four engineering changes.

Damn.