"Recliner" wrote

Surely there were large numbers of 1959 and 1962 stock trains in service
by then? Admittedly, their design was pretty similar to the 1938s, so
they may not have seen much newer.
They did, and the 1959 stock were the first 'silver' trains - but they did
not run on the lines used by the previous poster at the time.

Peter