The cards in this 660-card set measure 2 1/2" by 3 1/2". This year marked the first time Topps issued all the cards of its baseball set at the same time rather than in series. Among other methods, cards were issued in eight-card fifteem-cent wax packs and 42 card rack packs. The ten cent packs were issued 36 to a box. For the first time, factory sets were issued through the JC Penny's catalog. Sales were probably disappointing for it would be several years before factory sets were issued again. Some interesting variations were created by the rumored move of the San Diego Padres to Washington. Fifteen cards (13 players, the team card, and the rookie card (599) of the Padres were printed either as "San Diego" (SD) or "Washington." The latter are the scarcer variety and are denoted in the checklist below by WAS. Each team's manager and his coaches again have a combined card with small pictures of each coach below the larger photo of the team's manager. The first six cards in the set (1-6) feature Hank Aaron and his illustrious career. Other topical subsets included in the set are League Leaders (201-208), All-Star selections (331-339), Playoffs cards (470-471), World Series cards (472-479), and Rookie Prospects (596-608). The card backs for the All-Stars (331-339) have no statistics, but form a picture puzzle of Bobby Bonds, the 1973 All-Star Game MVP. The key Rookie Cards in this set are Ken Griffey Sr., Dave Parker and Dave Winfield.