This is an example of the very first, 1895, incarnation of what became known by 1898 as an Ultraprimus No.1 soldering iron furnace apparatus. The stove at the centre of the apparatus has a hexagon fitting screw-in pump the same as in this normal stove example of the same date. But since it was not being sold as a free-standing stove in its own right it is not fitted with legs and has absolutely no markings on it at all except for the old-style B.A.Hjorth provenance mark on the tank base. The burner fitted was of the type that was also used on the contemporary Hjorth Vesuvius blow lamps, which also first appeared in 1895. These specialist pieces of apparatus would have been marked with the 'duelling blowlamps' soldering equipment logo had they been made in 1896 or later, just as ordinary Primus stoves were marked with the stylised stove logo from the same date onwards. The special cradle and soldering iron heating frame and box are also slightly different from those shown advertised only a couple of years later: The relevant page in the 1898 B.A.Hjorth catalogue clearly shows the two key changes which had already been made to the specifications during those first 3 years of production: Notice that by 1898 the screw-in pressure pump had been replaced by a fixed pump following on from the adoption of the new patented NRV design. And notice that by 1898 a sizeable chimney had also been added to the iron heating box in place of the tiny vent hole which was all that had been provided in the top of the first version of the box photographed above.