It’s safe to say Blake Hall was one of London Underground’s quieter outposts out beyond London in rural Essex. It was originally built on a Victorian railway that was planned to run through to Chelmsford but that stopped at Ongar and never became more than a sleepy branch line. The inner part of the line was converted into extensions of the Central Line and electrified in 1949. The line through Blake Hall station to Ongar was also electrified in 1957 and worked as a self-contained shuttle branch of the Central Line until London Transport shut it in 1994. Blake Hall didn’t survive beyond 1981.
This neat, crisply-printed ticket is dated 5th January 1957 and, given its issuing number of 71, I would guess it was printed when London Transport took over the management of the line in 1949. Read more about Blake Hall station here.