chris hull

Want to find out what the figures stamped in the side of Husqvarna chainsaw bars mean. RSN B 20/50 050/1 3, 3/8 72DL 92630 GZ and so on. These are on my 20", .050, 3/8" bar. I want to know what they all mean so I can identify other bars when I want to make a purchase. I know what this bar is but what about others? Some sellers (such as on ebay) sometimes can't even tell me if the bar they're selling will fit my saw. For example, the photo I'm putting in this message.