I've got what I believe to be 1940s Lightning zip. I found a picture of an identical one on the Lewis Leathers site - oddly enough attached to one of their 40s jackets 'the countryman'. Not correct for your Belstaff sadly and probably worth lots more than a 60s Lightning. Have you thought of looking on eBay for a lesser value jacket with the correct zip to use as a donor? There are a couple of lightning zips on eBay UK at the moment - in Militaria - one is marked Air Ministry neither looks to be separable though.I am trying to restore a 60's Sammy Miller Belstaff and want to crown it off with the proper Lighting Zip. These are proving very hard to find, so any help would be greatly appreciated.