Nice one there! I believe the pickup codes mean 38th week of 1969, and it appears that you have the 1966 pots as do most other basses from '66 through '69. My '66 has the blue molded cap, which was found in all the blonde and blackface Fender amps of the same time period, and the solder joints appear to be undisturbed. From the photos you have provided, looks original to me. Others may have better information.