Bay Area residents can see legal tender taken to a whole new level this week, as coin and currency collectors from around the globe gather at San Francisco's Moscone Center for the World's Fair of Money.

The Santa Clara Coin, Stamp & Collectibles Expo will feature one of the four known examples of the 1879 Quintuple Stella/Metric gold double eagle patterns, in the piece’s first public appearance in Northern California.

Dealers at the 2005 MidAmerica Coin Expo June 23-26 said their sales were as hot as the 98-degree outside temperatures in Rosemont, Ill.