TNN143G GREY 1968 BEETLE

Whilst trying to find info my Grandad's last Beetle (see thread for DNU344G) I yesterday found the owners manual in his garage and inside is a 1st Birthday card issued by the garage, Beardalls of Notts for TNN143G which I believe was his briefly but was involved in some sort of prang so he replaced it with DNU344G. A quick vehicle check shows that the older car is still about:
The enquiry is complete

The vehicle details for TNN 143G are:

Date of Liability 01 05 2010
Date of First Registration 12 09 1968
Year of Manufacture Not Available
Cylinder Capacity (cc) 1192CC
CO2 Emissions Not Available
Fuel Type Petrol
Export Marker Not Applicable
Vehicle Status SORN Not Due
Vehicle Colour GREY
Vehicle Type Approval null

Any info on it's whereabouts would be much appreciated, in the meantime I'll have to quiz Grandad for more info on the prang!