Many players modified the bodies of their Musicmaster basses to accommodate Precision-style double pickups or enhanced electronics.The Musicmaster Bass was introduced in 1971, and originally came in either black, red or white finish.Like many of Fender's other budget-priced guitars, the Musicmaster Bass used many surplus parts from other Fender models.
I won’t get into the pros and cons of 1970s Fenders here, but instead, I hope to shed some new light on those weirdo neck codes.
Serial numbers may be useful in determining the year of production of a guitar.
But an incomplete registrations and illogical serial numbers is its history often unclear.
Therefore, while helpful in determining a of production dates, a neck date is obviously not a precisely definitive reference.
Most specifications for a given Fender instrument model change little (if at all) throughout the lifetime of the model.