Yes. Interesting paint color, but appears to be silver which according to this source was only for E bodies.
Code Description
E68 400-4 Barrel High Preformance
D34 TorqueFlite Automatic Transmission
WL21
W = Dodge Coronet / Charger
L = Low
21 = 2 Door Coupe
P3G
P = 400 260HP(net) 1-4BBL 8 CYL
3 = 1973
G = St. Louis, MO, USA
172937 Sequence Number '172937'
JA5 Paint Code: Unknown At This Time
B2X9
Trim Grade/Style/Color
B = B Class
2 = Vinyl Bench
X9 = Black
DX9 Upper Door Frame: Unknown At This Time
129 Date Built: 1 / 29 / 1973
190523 Order Number: 190523
JA5 Roof Type OR Color: Unknown At This Time
U Built to Specifications for USA Order
A57 Challenger / Charger - Ralleye
B41 Front Disc Brakes Some Yrs. Power
J45 Hood Tie Down Pins
M21 Roof Drip Rail Moldings
M26 Wheel Lip Molding
N41 Duel Exhaust w/o Tips
N42 Chrome Duel Exhaust Tips
N85 Tachometer
R11 Music Master Radio AM
V21 Performance Hood Treatment
V6X Black Longitude Sports Stripe
28 28 inch radiator
END End of Codes