Introduced in 1948, the Comet followed the ML and the Autocycle. Initially fitted with a Villiers 98cc Mk 1F engine, it remained in production until 1966.
James Models
Comet 1 1949-55
Villiers 98cc 1F
Rigid-framed with girder forks. Two models were offered, the Standard with direct lighting and the De-Luxe with a battery.
1952-1953 J3 Comet Deluxe models were fitted with a Villiers 4F engine
1953 Comet Model J10 98cc
1954-1955 Comet J11
1955-1964 Comet Model L1 98cc, Villiers Mk 4F, Mk 6F optional
Sources: Wikipedia, et al.