Wow... That takes me back. My father's shop sold all of those.
The shop was the Norton Viller's (i.e. Norton Commandos) top sales on the west coast for seven consecutive years .
Didn't sell Triumph, which was covered by Ted Evans shop in Venice, CA at the time, but sold Metisse with Zundapp, Hodaka, Montesa, DKW and Westlake powerplants.
Shop closed in 72 so I never saw ( or go to ride) the 1974 B50 (Dick Mann Replica ?). ....but I did a lap on a 72 Paul Dunstall (Cafe Racer) edition.
I was also fortunate enough to have ridden all of the above but my favorite was my AJS y4 Stormer pictured here:
Except mine was setup with the Stormers LTD (Morris Malone sponsors) downpipe.
I raced it (The Y4 - a right side shifter), and a DKW 125 (left side shifter) for the better part of two years straight. Try that in back-to-back races.