Tony Kemplen's article on the Cosmic 35 in this weeks AP brought back a few memories. I bought one from a stall in Club Row, an offshoot of London's Brick Lane for £5 in the 1970's. It did indeed suffer from light ingress which in my case was less of a worry as it was used for cave and mine photography, very successfully. I used in conjunction with a plug in flash cube adaptor which took four AG1 bulbs needing to be manually rotated after each flash. It's great feature for use in sub optimal conditions was that just 3 screws held the lens on and after a shoot I could detach it and tap it on a table to remove the grit. It's still around somewhere with all the other forgotten gems of my photographic past.