Just for fun… here is what I found for decoding of the SN.

3406B 12115

34 = J-300, 4WD, Gladiator
06 = Cab & Chassis, Truck
B = 6600# Max, Truck

1 = Left hand drive
2115 = sequential serial number

https://www.offroaders.com/tech/jeep/vin_61-65.htm