Not coveralls - This is a  shop coat with belt & buckle.   It is an original with all the grease and grunge.   UNCLEANED / AS FOUND.    Honest wear    1955 - 1956 - 1957          POCKETS:  1 breast & 2 hip      Belt - cuffs - collar & hip pockets have blue accents  

 
BOWTIE / CHEVROLET PATCHES (front & rear)              "OK"  USED CAR PATCH        Don't know what the 0/30 signifies.  NHRA CLASS ? ?

Stock - Super Stock - Factory - General Motors Dealer - Drag Racing - Classification - Pro - 

ACQUIRED THIS PIECE IN REDWOOD CITY, NEAR THE LOCATION OF THE DEFUNCT E-Z DAVIES CHEVREOLET DEALERSHIP (El Camino Real & Jefferson).  Located 19 miles from the long closed drag strip in Hal Moon Bay, California 

BRAND:  Riverside - Masterbilt  - Moultrie, Georgia - SANFORIZED - - All 4 buttons are present  -  See photos as to staining.                 SIZE:  42   Not sure if this shop coat is true to size, based on today's standards.  REAL SURVIVOR Mechanic worn