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NHRA 1960's Drag Racing Nitro fuel "ENDERLE FUEL ANALYZER" - $360 (Westminster)
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"All original" from the mid to late 60's Nitro fuel hydrometer with original wooden case that has for checking the percentage of Nitro fuel in your mixture of alcohol. This is a very nice set-up that was used professionally in the late 60's fuel ranks
If watch the movie American Graffiti. They were using in these in the race track scene.