I received this Irvin earlier in the week and have restored it. It is most likely a size 5, although pre-war jackets were not sized in this way. The fleece is supple and strong and has benefitted from one light coat of Pecards. I have replaced the post war Lightning main zip with the correct single trunnion brass DOT. The later collar buckle has been replaced with the correct rings. The elastic strap has been mended and is now secured properly. The sleeve zips are the rare un-marked DOT variety which were only used in the 1930s. Wareings had one pre-War contract, 22534/35/C.I, which was awarded in 1935 and was continued until 1939. They retained the first five letters and added the date and the last one I have seen from this contract has a 39 instead of the 35. The jacket has the wide belt loops and fine linked chain, which was typical of Irvins by this maker. Here are a few pictures taken earlier today.