The BSA is not stock, it is an A10 650 that someone has thrown a Goldstar Seat, scrambles tank and fenders on, or tried to cop the Catalina scrambler look anyway.
The Hybrid in front is a P11 and it has Matchless hubs but for this model AMC turned the the fins off the middle of the hub and left off the hubcaps, which probably saved a whole quarter of a pound off the combined weight of the standard hubs until they filled up with mud, eyewash.