This game is a special version of Williams' 1971 'Yukon'. According to Williams documents, this game was made for New York State (excluding New York City where pinball was banned until 1976) as well as for export to Italy. While the backglass carries only the single word 'Yukon', the manufacturer documents this game extensively as 'Yukon Special' and 'Yukon (Special)'. Federico Croci, a collector in Italy, reports that the symbols on the three slot machine reels near the top of playfield were changed to numerals, as slot machines were forbidden at the time in Italy. This can be seen in the promotional photo shown in this listing. Manufacturer data for Yukon (Special): Quantity produced for USA/Canada: 200* Quantity produced for export: 500* Total quantity produced: 700* Price to Distributor: $440.00 *These quantities may be sales estimates.