Located on a plate on the left front door pillar.

FIRST DIGIT: Identifies the Series

SERIES	CODE
Special (40) Super (50) Century (60) Roadmaster (70)	4 5 6 7

SECOND DIGIT: identifies the model year (C = 1956)
 
THIRD DIGIT: identifies the assembly plant

ASSEMBLY PLANT	CODE
Flint, MI South Gate, CA Linden, NJ Kansas City, KS Wilmington, DE Atlanta, GA Framingham, MA Arlington, TX	1 2 3 4 5 6 7 8

LAST SIX DIGITS: Represent the basic production sequence