I have been reading adverts for Irvin Air Chute suits in Flight Magazine. The adverts begin in 1937 and run through to 1940. The suits are identical to those worn by the RAF. The adverts often say: "The suit has been ordered in quantity for the R.A.F., but it will be available for club pilots and private owners who remain faithful to the open cockpit." What sort of label did they put on these private purchase Irvins? (Presumably they would not have an AM contract number on them) Or perhaps they did not put a label on them at all?
As most Irvins no longer have their original label there is no way of distinguishing a privately purchased one from an issued jacket prior to 1940, unless one is lucky enough to know the provenance of the jacket, or it has the airman's name/service number on it. From 1940 the kings Crown and AM were usually stamped on the zip pulls. I suspect they were lacking from privately purchased jackets from this time.
As most Irvins no longer have their original label there is no way of distinguishing a privately purchased one from an issued jacket prior to 1940, unless one is lucky enough to know the provenance of the jacket, or it has the airman's name/service number on it. From 1940 the kings Crown and AM were usually stamped on the zip pulls. I suspect they were lacking from privately purchased jackets from this time.