J.U.L.E. was established October 2007 as the only known dedicated register specific to all special edition MGB’s, MGC’s or Midgets which left (or were commissioned by) the Abingdon factory between 1962 and 1980. This includes any special prototypes or race prepared cars and the U.S. 1975 anniversary special/Limited Edition specials.
Also every MG car that left the Abingdon factory in 1975 had gold instead of silver badges to commemorate 50 years of MG see:-
https://mgb.tips/2019/06/23/1975-jubilee-year-mgs-a-little-known-fact/