I was briefly a student pilot in the British Royal Air Force about 15 years ago and recently found my flight jacket when clearing out some old luggage. I'm getting quite into the Cabourn and Real McCoy's repro thing at the moment so am wondering whether to keep it to wear or sell on. It feels like Ventile but it could just be tightly woven cotten. It's in perfect condition as I only did about 15 hours flying in it. Does anyone have any idea what something like this might be worth?