Always liked the look of the Sunbeam, but they were slow back in the day of slow bikes. Back in the '70's I used to intersect with a guy commuting on a Sunbeam every morning, apparently he'd been on it for many years. He never acknowledged me - I guess he thought my '61 Norton was too modern.
Sunbeam was owned by BSA at the time, really just a badge to put on one of their bikes. They also owned Daimler cars in that period, and Edward Turner designed the Daimler V8's - not what I'd call a cottage industry.