This lock can be opened with 1 lock: no matter which one.
It's a real life example of a brunnian link, a nontrivial link that becomes a set of trivial unlinked circles if any one component is removed. 
Discussion
Brilliant
But do you know what the purpose is?
It is a shared gate, this way we all have control over our own locks and keys, we had a version of this with a community gate in Arkansas, though less complex. We just cut a chain into sections and each person had a lock that was essentially a link in the chain.
nostr:note1hw4t9z89xtgqaxp3jg6mpa8dv6tuqadh4zmu4z4z2qytde7yrv4qh83sk5
This is so cool! I guess it's great if you're really bad at remembering where your keys are lol!
1-6 multisig 😅
Lock 18 and 15 wouldn’t, no room to slide metal strip up 🤷♂️