|Early Lionel box dates this 6 pack to the 1957 or 1958. This is a 6 pack of Insulated straight strack, track is fine the box is a 7 with a tab missing. Includes 6 #31-7 power blades. The outside rails are not connected together allowing this track to operate accessories and or signals. It also came in a curved track section,#49. (quite rare) as they were sold only as a separate sale items, never in sets.