Here is the tag breakdown
RH23:
Plymouth Belvedere,Satellite
Unknown
2 Door Hardtop
LC6: Unknown
Unknown
Newark, DE, USA
123651: Sequence number
E61: 383 cid 2 barrel V8 290hp
D32: Heavy Duty Automatic Transmission
FF4: Exterior Color
H1F8: Trim - High, Unknown, Green
EF8: Int. Door Frames
916: Build Date: September 16
: Order number
FF4: Top Color
A01: Light Package
A04: Basic (Radio) Group
B51: Power Brakes
G33: LH Remote Racing Mirror
J25: 3 Speed Wipers
L31: Hood/Fender Mounted Turn Signals
M21: Roof drip rail moldings
M33: Body Side Moldings
N88: Auto Speed Control
R11: Radio Solid State AM (2 Watts)
END: End of Sales Codes