Code

Meaning

Used On

14 Feb 66

Plain Date Stamp

Heater Motor (Ink Stamp)

Feb 14 1966

Plain Date Stamp

Alternator (Ink Stamp)

14B

"14" = Date
"B" = Month:
A or N = Jan
B or P = Feb
C or Q = Mar
D or R = Apr
E or S = May
F or T = Jun
G or U = Jul
H or V = Aug
J or W = Sep
K or X = Oct
L or Y = Nov
M or Z = Dec

Data Plate

B14

Reversed from above
(Letters A-M only)

Sometimes seen on Build Tag
(aka "Body Buck Tag")

6F14B

"6" = 1966
"F" = Mustang
"14B"-See Above

Horn (Ink Stamp)

6B14

"6" = 1966
"B" = Feb
"14" = Date

Heater Core

6B14C

"6" = 1966
"B" = Feb
"14" = Date
"C" = Work Shift
(A-C = 1st-3rd Shift)

Power Steering Pump Tag
Steering Gear Tag
Transmission Tag

6B14Q

"6" = 1966
"B" = Feb
"14" = Date
"Q" = Inspector's Code Letter (A-Z)

Engine Block

6B

"6" = 1966
"B" = Feb

Glass (Lower LH of "Carlite")
Engine Tag

6BC

Same, plus:
"C" = 3rd Week of Month
(A-E = 1st-5th Week)

Carburetor
Distributor
Rear Axle
Radiator (Some)

F6BC

Same, preceded by:
"F" = Mustang(?)
May also be a Manufacturing Plant Code.
(Some other codes seen: "Y" or " "(Blank))

Heater Box (Ink stamp)
Heater Plenum (Ink stamp)

6MB

"6" = 1966
"M"(Large) = Supplier ("M" - Motor Wheel Corp, Michigan)
"B" = Feb

Wheels (stock steel rims)

2 14 D 3
2 14 3

"2" = Feb (1-12 = Jan-Dec)
"14" = Date
"D" = Location (opt):
A = Chicago
B = Buffalo
C = Cleveland (Walton Hills)
D = Dearborn
M = Monroe, MI
W = Woodhaven, OH
"3" = 3rd Shift

Sheet Metal
Hinges

2-66
2 66

"2" = Feb (See Above)
"66" = 1966

Latches
Radiator

8-66

"8" = 8th Week
"66" = 1966

Seat Belts

2/66

"2" = 2nd Quarter
"66" = 1966

Clamps
Belts

026x

"02" = February (01-12 = Jan-Dec)
"6" = 1966
x = Unknown (Poss A-Z may appear here, or blank(?))

York A/C Compressor