Did you get your "chassis number" off of the chassis?
I'm pretty sure that your registration plate is swapped.
The number you listed: 24427287c... should be for an 88" not a 109"
(which I believe had a prefix of 254 or 264 depending on spec.)
Look for the actual VIN stamped on the chassis... Just over the righthand (outside-front) spring hanger.
(note: These are sometimes hard to read... they aren't stamped deeply and are often covered by paint/undercoating/etc.)
According to CalVIN... your plate number is for...
244 Model: Land Rover, Series IIA
Body type: Basic or Station wagon
Wheel base: 88in
Engine: petrol
Model years: 1962-1971
Destination: Export, left-hand drive (LHD)
27287 Serial number
C Design: Two significant design modifications
Suffix used from April 1966 till April 1967