I recently bought used Sting Ray , that looks brand new , it is SR with 4 strings , Sunburst body , transparet pickup cover and rosewood grif ... But i think that transparent pickup cover and a Hipshot D-tuner machine head are not original .Serial no is 42259 and i couldn't find it on MUsicmanbass.org , so i'm interested in finding out the production date of my MMSR .... thank' a lot