Discover a unique piece of maritime history with this vintage Richfield Hydrofoil "First Mate" certificate from 1966. This charming souvenir certifies the holder as a Qualified First Mate in Richfield's Mission Bay Hydrofoil Fleet, connecting the era of innovation in hydrofoil technology with the early days of Sea World in San Diego, California. The certificate features the distinctive Richfield eagle logo and the classic Sea World dolphin logo, making it a fascinating crossover collectible.

This piece of ephemera captures a specific moment in time when Richfield Oil sponsored attractions like the hydrofoil fleet at Mission Bay, offering visitors a memorable experience. It's a perfect addition for collectors of Sea World memorabilia, San Diego history, vintage advertising, or unique maritime collectibles. The certificate is a tangible link to 1960s leisure activities and corporate promotions.