Identical to this model from my 1938 BAT catalogue. As yet, heavy tarnish on the tank prevents identification of any possible engraving, but the UK source (to which Hasag exported their products as BAT) and the distinctinctive ‘dash-dot-dot-dash) piercing of the hood and collar - more of a BAT characteristic, as the catalogue illustration depicts - suggests it’s a BAT 42 and not a Hasag 42. My Optimus 200 photo-bombs to show the comparable tank size. The 3-piece hood … … suggests it’s been out of use a good while Some work to do! John
Interesting this lamp of yours, John. In the last photo you can see that bats like to hunt spiders. Greetings Stanisław
BAT was a brand used by Hasag for foreign markets. So the manufacturer is Hasag for sure, and the design is from the 1930's. The design of the chimney and hood points to a later production, the earlier ones were more similar to the Petromax design like this one. Congratulations to the good find, and if the tank has no cracks it will be a reliable runner once cleaned.
@Knee Bats! Spiders! Ha! Vert good Stan @Martin K. Thanks for your insights Martin. I’ve read your posts on 200cp Hasags and of their proneness to fount stress cracks, so yes, something I’m anticipating might be the case. I wonder if you know what the jet orifice should be? I suspect it’s worn (0.22mm). I daresay I could make comparison with my Optimus 200’s jet. Definitely a worn jet. I’ve just seen the specification for a 200cp jet is 0.16mm. John
I have just finished fettling an old Petromax 821 which had a 300CP jet mounted erroneously. I decided to replace that one with a 250cp Swiss 821/523 jet, because these are quite well obtainable and manufactured (opposite to the scrap you can buy everywhere nowadays). Although the jet is designed to burn petrol (0.18 mm) the lantern runs very well on paraffin (besides from the leaks in the fount).
