Yes - special order cars are special. Here's your breakdown from an online decoder. I corrected the "I" to mean "International" and the "XW" to "black and white":
E55 340-4 Barrel 69-73
D21 Heavy Duty 4-Speed Manual Transmission
JH23 J = Dodge Challenger
H = High
23 = 2 Door Hardtop
H2B H = 340 240HP(net) 1-4BBL 8 CYL
2 = 1972
B = Dodge Main, Hamtramck, MI, USA
260039 Sequence Number '260039'
GF3 Paint Code: Medium Green Metallic
B6XW Trim Grade/Style/Color
B = B Class
6 = Vinyl Bucket Seats
XW = Black and white
000 Upper Door Frame: Full Door Panel
B24 Date Built: 11 / 24 / 1971
E05769 Order Number: E05769
V1W Roof Type OR Color: Full Vinyl Top - White
I Internationl
B51 Power Assisted Brakes
C16 Console w/ Buckets
C56 Bucket Seats 1972 up
G15 Tinted Windshield Only
G37 Left Hand Remote, Right Hand Manual Chrome Mirrors
H31 Rear Window Defogger - Blower
J54 Hood Insulating Pad this may mean sport hood?L25 Trunk Compartment Light
L31 Hood / Fender Mount Turn Signal
M21 Roof Drip Rail Moldings
M25 Wide Sill Molding
M42 Front End Molding
N23 Electronic Ignition 72 only
N41 Duel Exhaust w/o Tips
N42 Chrome Duel Exhaust Tips
V7W Accent Stripes - White
Y39 Special Order 69-71 26 26 in. Radiator
EN2 End of Codes Assembly Line 2
Cool car!