The serial number says it's a late '72 996, rather than a 995 (referenced from Ingemar Karlssons excellent website: http://web.telia.com/~u05100714/index.htm). I can't say as I can recall the exact difference between a 995 and a 996, but I'm sure someone more knowledgable will be glad to inform you (and me lol)...
Cheers, JV.