This one was worn by a Gp Capt and dates from the mid '30s and is the work of Wareing and Co of Northampton. It appears to be a large size. I have owned two of these jackets and they are a robust jacket. This one has a few small holes which can easily be repaired. With the provenance it should go for more than £600.
http://cgi.ebay.co.uk/RARE-original-RAF ... 0221022028
http://cgi.ebay.co.uk/RARE-original-RAF ... 0221022028