"Mayfair" and "Hyde Park," two pinball machines released by D. Gottlieb & Co. in 1966, share a similar design but cater to different gameplay styles. Both games were designed by Ed Krynski, with artwork by Roy Parker, marking his final contribution to pinball art. "Mayfair," released in June 1966 with a production run of 2,120 units, offers standard gameplay, while "Hyde Park," released in August with 951 units, is an add-a-ball version, allowing players to earn up to five extra balls per play.