Is it just me or is that only a three quater zip on the front? There was a Norwegian maker at the time whose sailing foul weather kit was de-rigur, if I can ** remember the name! These look very similar. They were a lined PVC. The proper oilsking was black with buttons, and your name stenciled on the back. As little Nozzers it was allowed if the PO was in a good mood , to flap your arms as you marched, made a very loud crack as arms hit the sides, ah, from this distance happy days!