"Test engineering department 918. Name of record 52-1316. Master CE cartridges. Period covered 2200001 796-12 disk cartridge Method of updating or desctruction data P.U. date enetered into storage 10-30-68. Date to be destroyed P.U. Box 2 of 2." is written on the cartridge. 4394 is written in pencil on the top of the catridge.