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by bombcar 1178 days ago
You often have to "crackpeek" to see the state of the basic mechanical latch in the USA: https://www.reddit.com/r/pics/comments/11rd9ia/i_hate_how_to... has a picture

The "moving part" doesn't go through the door.

Fancier bathrooms have deadbolts or equivalent that show the occupancy on the outside; amusingly enough so do the portapotties.