I'm a big fan of this umbrella with a window from 1935

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18

from the article " " The new isinglass window eliminates . . . "
i·sin·glass

/ˈīznˌɡlas,ˈīziNGˌɡlas/

noun
noun: isinglass

  1. a kind of gelatin obtained from fish, especially sturgeon, and used in making jellies, glue, etc., and for clarifying ale.
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