Thanks everyone, I used the BSA info and the bike is a 1968. This bike is going to be for sale, and we don't have a good idea of what to ask. It is part of the MotoTalbott Museum where I have been working recently and we just need to make some room for new arrivals. If anyone wants to see a photo of the bike and others in the collection, check out www.MotoTalbott.com.
Better yet, stop by and see everything in person. We are in Carmel Valley, California on the Monterey Penninsula. It really is a great place, and if you come by on Friday or Sunday I will be your docent. Mention Britbike and get a discount on admission. At 175 motorcycles and growing, we are the largest motorcycle museum in the western US. Thanks again for the help.