Hoping to outfox the new artisan haute dog impresarios (Let’s Be Frank, Showdogs), old-school frank purveyor Casper’s Famous Hot Dogs is commemorating its 75th anniversary today with a special promotion at its eight Bay Area stands. During the day-long celebration, customers will be able to snarf the signature Casper Dog that goes snap for just 75¢ (one per customer and while supplies last).