This one (see Pic 1) is from WWII. I found it at a flea market a few years ago. "Alemite" (see Pic 4) hand pumper with a 5-foot hose and a goose neck nozzle mounted on a skid with casters. Marked "U.S. ORD" (see Pic 5) for US Army Ordnance Department, which was responsible for all wheeled and tracked vehicle maintenance for the duration of the war after August 1942, when the QMC was relieved of that duty.
This would be pushed around a motor pool or depot to grease vehicles (Zerk fittings) or fill up smaller grease guns.
Official nomenclature is “GUN, pump, bucket, lubricating, low pressure, with flexible hose, 25-50 pound capacity.” See Pic 2 for matching manual figure.
The large red "CG" stencil (see Pic 6) indicates the type of grease, which was general purpose. You can see some of the other types in the Jeep Lube Order (see Pic 7 & 8).
The other stencil ("B 109") could very well be a unit marking, and if so, it's a good chance it's B Company 109th Infantry Regiment, which shipped out of Ft Indiantown Gap, PA. Most of the unit was made up of young men from PA, NJ, and NY.