I'd certainly say that's a Moose (Elk

) two equal sized but DIFFERENT blades at opposite ends, just like the Forum Knife 2010 from Queen..
Naming nomenclature is hideously and notoriously a minefield

Makers use a name loosely as maybe an advertising gimmick it takes on parlance then agéd experts tell you it was always like this OR conversely, a travesty and NEVER been this, fume
Streamlining is needed

Stockman or Cattle Knives have always been 3 or 4 blades sometimes even more but not less. Stockman frames vary: Serp, Humpback, round bolster, square, shadow, Equal End Cattle knives, and SIZE varies too from mini to massive. Lot of people sneer at Half Whittler, Half Congress naming but it's taken on. Half Stockman seems a bridge too far...(gelded by having no Spey?

) My own idiosyncratic approach is that I go along with those, who for clarity, define a Jack Knife as a 2 bladed knife from the SAME end or pivot and usually one of those blades is smaller than the other Master/minor. A Pen Knife is a knife with blades at opposite ends with one smaller than the other, usually but not necessarily, single-spring. I don't see size needing to come into it- CASE had a large Pen Knife until the mid 70s Clip/Pen and 3.75" / 9cm. Pen for me differentiates it from Jack.
Thus Jer's Böker as shown on post No. 10 is for me indeed a Serp Jack. Whereas I think I'd prefer to call the Forum Knife 15 and 18 which are clearly based on Stockman frames but in Pen arrangements as a Stockman Pen.

Kind of suits the context no? And the blades are of different size unlike a Moose (Elk)
Stockman Pen is a lot sexier than Double End Jack, just saying'
