A brass PRIMUS No5. J:nr. dated E (1915). This one was my grandfather's, who acquired it from one of his properties on the north-east coast of Quebec (Escoumins area, St. Lawrence/Saguenay River) some point in the 1940's. I've had it for the past 15 years and just finished polishing her up a few days ago. She had no inner burner, prickers, pre-heating shield, box or instructions. Spirit cup appears to have been welded to the fount and is in an unusual position (normally between burner/riser tube). I only polish up the stoves if they have blemishes or verdigris, and this one met the criteria. Before polishing, but washed down with degreaser. She came with two pot rings, one the standard (never used) PRIMUS-labelled one and the other already set upon the 3 pot supports. The word PRIMUS is stamped into the outer ring between each riser. On the pan's inner ring: REGISTERED, No. 600229, MONSTERSKYDD, NUMMER 293, GEBR MUSTER, No 11005. Outer silent cap of brass and labeled PRIMUS SWEDEN. I do not like repainting items so I simply dry-scrubbed the ring with 0000 wool. Before cleaning Underside - Underside original - Bottom of fount labelled A/B B.A. HJORTH&Co STOCKHOLM, MADE IN SWEDEN, E and what look looks to be the number 11 offset to the right. Star logo between a few of the words. Unpolished - A ding on the upside tank from the pump cylinder Original - Fuel cap labelled PRIMUS (both sides), as is the vent screw (one side). original Pump cap labelled PRIMUS MADE IN SWEDEN (with a star logo between PRIMUS and MADE) TRADEMARK PRI-MUS and stove logo in 5 languages Another TRADEMARK set in 5 languages (unpolished) Riser on inner burner base labelled PRIMUS SWEDEN Burner appears to be welded to the riser tube. Replaced the dried original fuel cap gasket with one I cut from viton (1/16th"). Pump leather in good condition but dry so retained it and soaked in 3:1 oil. Replaced original cork PIP in NRV with one I cut from Viton (1/8th"), retained original brass spring but added o-ring (no original washer). I gave her one of my spare inner burners so she'd be safe to run. Stove passed the pressure test, filled with kerosene and primed her Initial flame with a fair bit of orange as some polish/cleaning agents are burned off Fried up some popcorn last night, she ran very well and hot - outer burner cap glowing cherry red. Stove functions very well, and cooked up brunch (fried ham, scrambled eggs) on her this morning. Lovely domestic stove. From my understanding, the J:nr versions had a smaller burner for fuel efficiency and a smaller fuel capacity. The Juniors were not manufactured for very long compared to the S:nr (Senior) or standard 5 versions, I believe production ceased for the J:nr's some point in the 1930's. They also came in a nickel-plated version (as did most Primus stoves of this kind).