Nice score!
I'm suppose to be selling so I haven't been watching ebay and you're lucky I wasn't.
Buckman (Union) and Frisbe are the two exceptions but happy that you got (if it wasn't going to be me)

Rare, of the only two that I've ever seen they were different size and had different accessories mounted and a collector in Ohio told me his had different tools then the one sold on Liveauctioneers 10 yrs ago. This one larger with more stuff on it.
Congratulations,
Al