Erith & Dist Motorcycle Club Car Badge

Erith & District Motorcycle Club 76 mm (3") Diameter Manufactured in alloy and painted. Centre bolt mounting from the rear Affiliated to the Auto Cycle Union (ACU) South Eastern Centre 1931-33 in 1948 and again in 1959-89 when my records go up to. There was a Erith Centre Motor Car & Motor Cycle Club in 1949 and an Erith Motor Club in 1951-58 suggesting that this Club could have had a name crisis in the late 40's and 50's. I would guess that this badge is from the 60's.