Gave both my blow torches to my neighbor that has a collection of ~100 of them.
Some he has are so small their tanks hold just a couple of hundred ml and have no pump as the head heating bowl is part of the tank so when heating the head the tank get pressurized while doing so. That they are also so compact there's enough heat from the head to keep the tank pressurized.
His big blowtorches have tanks of at least 1 imp gal (4.5l) and hand pumps like an old bicycle stirrup pump to pressurize them.....these make Joes new acquisition look like a toy.

Some rare medium size models even have 2 nozzles one of which is quite small and can be lit without preheat, just with a match and its only purpose is for fast heating of the main head to get it up and running quickly.
Typically fuels were kerosene and white spirits (78 octane petrol) however every model was designed to run on one or the other and not normally either. Preheat fuels used also depended on OEM design with white spirits (gas) units able to preheat on spirits/gas although it turned the head black with soot and kerosene was even worse so methylated sprits was the preheat fuel of choice for all types as there was no soot produced however the inconvenience of also needing to carry a lighting fuel meant meths was rarely used and consequently blowlamp heads were normally a sooty black that mostly burnt away in use.
Joes use of Coleman fuel was a good safe bet not knowing precisely which fuel it might run best on and also adequate for the preheat although one would normally open the fuel valve just before the the preheat flame had used all it fuel for the preheat flame to also light the burner.
Earlier in my lifetime it was common to see blowlamps used by various trades and particularly plumbers before silicone sealants were in wide use.
They mostly used these:

However this style of iron was also useful for sheet metal jointing work:

Telecoms used blowlamps and large handheld irons for their early lead wrapped cable joints and their large copper irons were prized in NZ for conversion to lamb tailing irons which we normally heated in the coals of a small fire in a 4 gallon tin.
Big irons like the one on the blowlamp here:

Main blowlamp brands we saw in NZ were Primus and Sievert.
Must get a pic of my buddies big collection................