An early 1930 regulated nickeled Primus 70 L. This version was likely the pre-cursor to the first version of the Primus 71, which appeared in the 1931. So I date this 70 (71) to c1930/31. This version shares the following with the 71 models: soldered pin on the fount (emergency venting), dimpled fuel tank for spirit well (no separate/raised spirit dish), soldered mound on bottom of fount, regulated burner with key/chain, burner bell design, etc. Shares these features with the 70: fount stamping: No. 70. Unique features: fuel cap labeling (hybrid between both versions) Shown here with silent damper. Stove was used, as was the case, but in fair condition. Steel linked chain connected by hooks around key and regulating stem. Soldered venting pin located between fount stamping NAPTHA and PETROL On the side TRADE MARK PRI-MUS with stove logo Opposite side: PRIMUS No 70 MADE IN SWEDEN Depression around vaporiser tube for spirit well. Fount stamping: BENZINE and BENZOLINE Underside, no date stamp, soldering mound. Burner bell with shortened neck. 4 thin slits and 4 round holes like those in early 71 models. Fount cap stamping: PRIMUS SWEDEN (no surrounding oval). Notched regulating key/tool Tin is later model for the 70's. Looks like someone closed this either when the stove was operating or just turned off. Two parallel steel waffled pot supports. Roarer designation. With silent camp No 4200, steel. Silent cap also fits 71's, 96 and 97 stoves (among other models). All she needed to operate safely was a new fuel cap gasket. Original wick appeared fine, uncharred in the fuel tank. Original cork dried out and no longer held pressure, replaced with one cut from viton, 1/16th". 1/2 filled tank with coleman fuel, primed with methyl hydrate and lit. With the silent damper Medium output. I'm not a big fan of the standard Primus 70 models - they have small fuel tanks, unregulated, wasteful on fuel, can be a challenge to extinguish, can't pack away until completely cool and more dangerous to operate. This 70 is pretty much identical to the first 71 models, a vast improvement over their predecessor due to the regulated burner. Their colorful attractive tins however, both the 70's and the early 71 models, are much too flimsy, among other drawbacks, imo for anything but car camping or use in the backyard. However, when coupled with the larger E kit (rounded aluminum draughtshield/pot support/nesting kit), they offer a much improved and flexible combination worthy of more demanding activities. These late model regulated 70's, like the early 71's, imo show a number of drawbacks versus later model 71's. Later 71's had larger fuel capacity (reducing fill-ups and extending cooking times) and longer regulating key (preventing burns, safer operation). Still, this hybrid is an interesting link in the progression/history of the model line of 70/71 stoves and still a great performer when coupled with an E kit.