This is an Vietnam War era USAF  F-104 Starfighter and  Lockheed SR-71 Blackbird look alike type Mach Airspeed  indicator gauge instrument. The SR-71 was a very high altitude reconnaissance aircraft that flew very fast.  Today all the SR-71's are in museums. This gauge looks like the one used in the SR-71 but I do not think it actually was.  The F-104 was used be several countries as a fighter. Today a few are still flying in civilian hands. This instrument is 3 1/4 x 3 1/4 x 8 inches We accept payment by PayPal in US dollars only. Payment must be received within 10 days of auction closing unless prior arrangements have been made. Buyer to pay shipping by US mail. AZ residents add 6.7% sales tax. If you have any questions please contact me via e-mail before bidding. Thank you for your interest in my auctions.