Elvstrom Protest Tool?

Jul 30, 2018
N/A N/A Saginaw Bay

Anyone have any idea what this little protest tool/aid might be called and where to find one? Our dog got ahold of it last night and it carried some sentimental value as a hand-me-down from my father in law. Wife was not too happy it got chewed up.

Elvstrom Tool.jpg

From what I can tell it might have came from an Elvstrom book on sailing rules, circa 1970-80?

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