Operator: Dunedin
Fleet No: 1
Registration No: P1-946
Chassis: BUT RETB1
Chassis No: 491127
Electrical equipment: Metropolitan-Vickers
Motor: MV 210D with AG20 generator
Body: New Zealand Motor Bodies B40D
New: 1950
Withdrawn: 1966

Additional information:
I believe this to be on a demonstration run on the opening day, 23-Dec-1950.