The cards in this 240-card set measure approximately 2 1/16" by 2 1/2". In 1949 Bowman took an intermediate step between black and white and full color with this set of tinted photos on colored backgrounds. Collectors should note the series price variations, which reflect some inconsistencies in the printing process. There are four major varieties in name printing, which are noted in the checklist below: NOF: name on front; NNOF: no name on front; PR: printed name on back; and SCR: script name on back. Cards were issued in five card nickel packs which came 24 packs to a box. These variations resulted when Bowman used twelve of the lower numbers to fill out the last press sheet of 36 cards, adding to numbers 217-240. Cards 1-3 and 5-73 can be found with either gray or white backs. Certain cards have been seen with a "gray" or "slate" background on the front. These cards are a result of a color printing error and are rarely seen on the secondary market so no value is established for them. Not all numbers are known to exist in this fashion. However, within the numbers between 75 and 107, slightly more of these cards have appeared on the market. Within the high numbers series (145-240), these cards have been seen but the appearance of these cards are very rare. Other cards are known to be extant with double printed backs. The set features the Rookie Cards of Hall of Famers Richie Ashburn, Roy Campanella, Bob Lemon, Robin Roberts, Duke Snider, and Early Wynn as well as Rookie Card of Gil Hodges.