1975 was the anniversary of 'Old Number One' so the factory built 751 'Jubilee' MGB GT's to commemorate that event; they also did 1 Midget 'Jubilee' and 1 MGB roadster. To carry the 50th theme to the entire car line, some '75 MGB's & Midgets had the molded in 50th badge - not all, some starting somewhere around the middle of the year.....but, its no big deal other than the dash is hard to find.