The Sample/test game has different playfield art and different pop bumper caps than the production version. Its cabinet colors are different as well. Production Run Records for Tri Zone: Production Start Date: Jul-30-1979 (may not include sample games) Production End Date: Sep-21-1979 Production Run Quantity: 7250 First ship date: Unknown Last ship date: Unknown Product History Record for Tri Zone: Quantity produced for USA/Canada: 3323* Quantity produced for export: 3347* Total quantity produced: 6670* Price to Distributor: $1289.50 *These quantities may be sales estimates.