It looks like the cat will just not stay in the bag! So I may as well tell the tale ;
It all started when a guy named Jim Parker managed to own W.R.Case and Sons for a brief time.
He fairly quickly decided to sell off (some say "loot") parts of the Factory Collection, in a vain attempt to stave off bankruptcy (alleged). These lovely knives were dispersed throughout the community, and this one was offered to me a number of years ago, to purchase. I still consider returning it to the Factory Collection, maybe when I am a little older, but for now I'll enjoy it.
It's a Case Tested XX 62074 1/2PU.
Here is a scan of the catalog for the sale auction. The (same) knife is the top one, of course.
The handle pattern is nearly identical to GEC's 66 serpentine pattern, which was part of the inspiration. GEC went to great lengths to come up with an authentic punch, improving it very slightly, to make an impressive knife. I'm feeling like this will be our best production/reincarnation of an antique knife, to date!