I'm am gassing for a older single coil 50's type p bass and wondering what years and changes. I know they started around 1951 and were made till ??? Before the went split coil like we see on most p basses around 1957. I know the added a arm contour around '54/55. How long did they make the type with the arm contour before they stopped making them and started rebadging them as a telecaster bass. I know the first 3 to 4 years of the telecaster bass was a single coil until they put a fender mudbucker in the early 70's but I think most of the telecaster basses were slab bodies. What other years can I search for? We're they constant from '51 to '70 with the single coil version?