国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 9月25日 04時05分

Figured out what our #historicgoop (see previous post) is yet? Here's a clue!
It became a routine part of workers' mornings as more people got jobs in cities, especially in crowded offices. In this 1910 postcard, you can see employees of the Metropolitan Life Insurance Company.
See our next #ObjectProject post for another clue!

[BIHAKUEN]UVシールド(UVShield)

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