Bosch 1 197 311 090, regulator 14 Volt, 60 A - 90 A, for many type of Bosch Alternator.
E.g. for use with Vanagon T3, different Rabbit and much much more engines which have Bosch alternator from around 1980 up to early 90 years.
It´s most popular regulator from Bosch for the above years an fits Bosch alternators e.g. from Volkswagen, Audi, BMW, Mercedes and much more.