This is a collection of photos and information from BMW riders and collectors.
These bags were supplied by Butler and Smith for both the /2 and /5 series. Only the mounts were different. The leather was very thick and stiff. The mounts were well known to break, but that was mostly because they were overloaded. They were not highly waterproof and users would wrap the contents in plastic bags. They were probably the least expensive bags one could buy for a BMW. The 1971 parts book shows two sizes of leather bags and no Krauser bags.
These bags came in slightly different shapes and got distorted by use. I think that over time, different contractors made them for motorcycles and they were imported by Butler and Smith.
via : http://w6rec.com