Here's the SS4 detail; no word about why there were any, yet so few. My best guess was that they put handles on leftover blanks.

Garth said that he thought there were three, but I only saw two and nobody would 'fess up about having grabbed the third. The dog who got the second said that he was offered cash if he'd let another attendee buy it. SS4s are hard to find and this is the only one I've gotten at the release price of $139.95. I paid over $200 for the last original one I bought (in 2009) and it was [gently] used: