This is a new old stock still sealedStainless steel non- locking fuel cap by Mafco . Part Number B334A.
Applications on the packet are
VAUXHALL
Firenza 1971 on
Ventora FE 1972 on
Victor FE 1972 on
Victor FC 101
Viva 1970 on
VX 4/90 FE 1972 on
Collection is welcome