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Today's interesting old object of the day, "chatelaine"

> A chatelaine is a decorative belt hook or clasp worn at the waist with a series of chains suspended from it. Each chain is mounted with useful household appendages such as scissors, thimbles, watches, keys, smelling salts, and household seals.

https://en.wikipedia.org/wiki/Chatelaine_(chain)

I guess you can consider it to be "ye olde carabiner" XD