The history of Zyn is quite a strange one,After WW11 the importing of Zildjians stopped into the United Kingdom[import restrictions]things were tight.
At the same time the British Gov. had a lot of Italian P.O.W.s who did not want to rush back to Italy,we still have today a few who settled where I live,there was a camp here.
Any way the Gov. tried to find them work in Britain in their old trades,they had a group who were cymbal makers.The connection was made and the P.O.W.s started work at Premier setting up the Zyn production from about 1948 untill about 1955,The first Zyns were Italian style cymbals,the metal seems to be close to B20 although it does vary over the ones I have.There were Standard Quaility and Supers,usually in the smaller sizes,I have about 8 standards and just the one super,the Standards are very like prewar sounding thin italians.the Super sounds a lot like a prewar K zildjian to me,but they do vary quite a bit sound wise,some are very good,some are just crap. BUt they are nothing like the Zyns made after the Italians left.Zyn did make some fair cymbals but nothing like as good as the first Italian P.O.W.s made.
hope this helps .
Dion:)