A mainline type of luck chain letter characterized by (1) copy quota five, deadline 24 hours and wait nine or four days, (2) a managed list of six senders on the earliest example, and (3) an instruction to send the letters to " people you wish prosperity to." Known from two examples [ 1933, 1939], a reduced post card form [ 1937] and later retitled "Luck of London" letters [ 1944]. CLEVO