Here is a New Old Stock BRT Rear Wheel Bearing Kit (for one side) complete with Quality Original SKF Bearing & Collar (there are marks, there isn't a O Ring with it) for 

Opel

Ascona 1.6 (not Automatic) 1976-81

Ascona 1.6, 1.9 1970-9/1975

Ascona A 1.2 1970-75

Ascona A 1.6N (from chassis no.'s 2453081 & 9483908 on) 1970-75

Ascona B 1.2, 1.3N, 1.6N 1976-81

Kadett B 1.0, 1.1, 1.2 (from chassis no. 12340688 on) 1963-75

Kadett B 1.5, 1.7, 1.9 (from chassis no. 12340688 on) 1968-75

Kadett C 1.2 1973-79

Kadett C 1.6S, 1.9E, 2.0 with Disc Front Brakes 1973-79

Manta A 1.2, 1.6 (not 1.6S, 1.9S) 1970-9/1975

Manta B 1.2, 1.3N, 1.6N 1975-89

Olympia A 1.1, 1.2 1966-71

Vauxhall Cavalier Mk1 1300 1977-81 models.