Hi, here are some shots of my Primus 742, dating from 1935 (Z21). This is a 4 pint capacity commercial/industrial paraffin stove, fitted with three roarer burners and a complicated set of inter-linked spirit cups. It is also fitted with a heat shield to protect the tank from radiant heating when the burners are running. Perhaps it should have been called a 747, as it makes as much noise as a jet airliner when it is running. It probably uses the same type of fuel, come to think of it. Best Regards, Kerophile.