I am curious about any insights anyone can provide- year, did Cooper build eclectic group sets like this or just sell frames?
...all the ones I've seen here, near the San Francisco bay area, were sold at Bicycle Odyssey in Sausalito. They've all had a variety of components, on them, some high end, some mid level. So I presume they were sold as frames originally. Tony Tom was the guy taking the orders and building them up for customers, but
he's passed away. That's about all I can offer as information.
I've had three or four of them here, from different decades, and they all ride nicely.