Vintage Key-Shaped Souvenir Thermometer Insert "Butte Montana" Made in Japan For Sale

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Vintage Key-Shaped Souvenir Thermometer Insert "Butte Montana" Made in Japan:
$15.00

Made of metal alloy with a copper plating. This thermometer is old, but still works. I don’t know the exact year it was made, but the person who owned it lived in that area until she died in 1952. The blue medallion has what looks like a swords which Butte, Montana on it. It is 7.25” long and weighs 3 oz.