Few days ago, my friend gave me Hasag 252 lantern. Used, but looks very good. I checked some sealings, replaced "main" lead washer and inspected vaporizer, jet and jet cleaner needle. Jet is smaller than on Petromax 500HK and marked with number "3" on the side. I decided it should be 300HK and assembled lantern with "Gold Mohar" 300-400HK mantle. If interested, I uploaded short video on youtube. Petromax 829B 500HK and Hasag 252 300HK Jiri