I enjoy reading old ME magazines and LBSC frequently mentions 5 1/2 pint blowlamps as if they are the ultimate before moving up to oxy acetylene.
Purely out of curiosity what would be the equivalent in propane burner – 50mm????
Incidentally Amazon still lists a 2 lt paraffin blowlamp, and another where the capacity is not mentioned, but it looks strikingly like the paraffin blowlamp I used as a teenager 50 years ago with the burner on the end of a flexible hose (and with which I nearly incinerated a group of friends – long story!).
Nick