Rohan wrote:No, they were fibreglass.
The exceptions being the Fastback LR and Interpol tanks.
Rohan wrote:Metal tanks appeared for the 1973 850 (and 750) models,
1972 750 tanks could also be steel from 203200 according to the RGM tech. notes, and 'Steel' as well as 'Glass Fibre' tanks appear in the '72 parts book.