I seem to recall Stamford Brook and Dagenham Heathway being among the other experimental stations that had gates (some of which remained in place for quite a while afterwards - certainly into the 1980s). These gates (not sure if they were identical to those on the Victoria line) only took "yellow tickets" (only singles, not returns - which, at least in my neck of the woods at the east end of the District line - were green cardboard and had to be torn in half - or seasons), so they were intended to compliment, rather than replace, the manual barrier/ticket check.
I do remember the large number of automated ticket machines in some central London stations, each of which only issued tickets of one value (this is before zonal fares) - I think tickets issued by these machines were encoded to go through the gates. (They had a brown back, presumably with some magnetic coding - sure I've used similar tickets on the Glasgow Underground, as it was called at the time, sometime between the mid-80s and mid-90s)