Not being an expert on USAF nylon jackets, is this OK or is it a much later Alpha repro, the removed label and 'm' in the pocket got me thinking.....
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0397907794
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0397907794