So it took me seven years of on-and-off fiddling with it (mostly it sat in a drawer while I was frustrated with it), but after some concerted effort in the new year I’ve successfully solved the metal pocket puzzle that I was given for Christmas… 2008. Checkmate, Aunt Viv!
I won’t spoil it for anyone, but early on I had figured out that the asymmetric linkages (look at the top one on the left, vs the top one on the right) were the key to getting the dangly bit off – it just took me forever to figure out what to do with them. 🙂 It ended up being one of those things where it’s easy to overthink the answer. I was obsessed with a red herring for a long time – the solution ended up being a perspective thing.