| The picture below shows a larger top and bottom view of this Old Hard Plastic Sterling Multiplier School Pencil Box with Pencil Sharpener. There was a sliding part with a window that was originally on this case that would give the answers, but unfortunately it is missing. The pencil box is not dated but it is believed to be from the 1950s. The white ruler section slides open. The ruler shows 3 inches on one side and 7 centimeters on the other. It is made of red and white plastic and it is marked as follows: (on the ruler)
555 STERLING SP
MULTIPLIER PENCIL BOX (on the bottom)
PAT. NO. D - 157, 534 (on the pencil sharpener)
NO. 502
PAT. D - 146,197
SP
MADE IN U.S.A. The closed pencil box measures 7-5/8'' long. It appears to be in excellent condition as pictured, but it is missing the sliding part as mentioned above. There is a partial Bradlees department store price sticker on the bottom that could be easily removed if desired. | 
