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Vintage Dwyer WIND METER MPH Dwyer Instruments | eBay
Portable Wind Meter | Portable Wind Meter that is a direct reading with no calculations. Made from sturdy plastic and has a case. | Dwyer Instruments
Wind Meter | National Museum of American History
Mark II WSI | Wind Speed Indicator is a molded white plastic instrument that indicates wind speed directly on liquid filled scale. Low cost and practical. | Dwyer Instruments
Dwyer Instruments Wind Speed Meter, 0 to 80 mph MARK II WSI | Zoro