Ryan Murdock bought this NOS Monarch pump HY-LO-JEEP and he shared the information with us.
I was fortunate enough today to gain ownership of a small treasure trove of NOS goodies. At one point, these were all destined for the scrap heap. Thankfully, the Jeep Gods stepped in and granted them salvation. Pump: Monarch Machinery "HY-LO-JEEP" plow pump. Literature dated 1959. This is probably the coolest piece of them all. It is definitely NOS and comes complete with tags, instructions, and installation hardware.