How do I identify vhs tape numbers on case to manufacturer?

Robert Morris New member Username: Dvd_recording Kalamazoo, Michigan USA Post Number: 6 Registered: Jun-06	Posted on Sunday, May 08, 2011 - 17:17 GMT What do the numbers stamped on the vhs tapes stand for? Is there a way to identify them to the sleeves?
ieee488 Silver Member Username: Ieee488 Post Number: 597 Registered: Dec-07	Posted on Sunday, May 08, 2011 - 23:40 GMT Huh? What numbers?