The ABC murders were were published in Januray 1936. This copy is undated but using the 'recently printed' list inside the book I can guess it was printed in the early 1950s. It was not printed after 1957, due to the price of 1/6 on the cover. It was no. 63 of the White Circle Crime Club title list.
The adverts in the front and back covers are for Linovent, Cadburys and Bravingtons Jewellers