Set M - Green Baize Playing Pitch Cloth.
"...of a superior quality, whipped at the edges and imprinted with the pattern of the field of play 54 in x 36 in for playing area 48 in x 32 in. Both sets K and M consist of materials which have been specially selected as being the ideal surfaces on which to play Subbuteo table Soccer.  This marked-out playing pitch is a very handsome article. A new type of cloth - the result of much research."

These pitches are far superior to the modern nylon type pitches and in my opinion are second only to the Astro Pitch.