Used by donor's family in the 1950s,60s,70, & 80s. They were originally made at the Commonwealth Aircraft Factory after the war to use the facilities available.Namco Pressure Cooker - a large heavy aluminium saucepan with a close fitting lid which seals on a rubber ring (missing). The lid is locked in place by wide interlocking lugs on the saucepan and the lid. It has a gauge to indicate pressure and a lever and seal system on the lid which locks into safety lock. The safety lock includes a stem release hole in which a small round plug is inserted. The pressure can be adjusted. Also included is a lead safety plug to release the steam if it overheats. Two bakelite covered steel handles aids its use.526Y on both handlesdomestic items, cooking