Ah, I see the annual spamming of the Photos forum has begun, just in time for the DT Awards. Welcome back from New Zealand.

Did you get to meet xwhatsit?
EDIT: Looks like the photos are from the end of October perhaps before the trip, another thread implies you are still there.
This reminds me that I should get some more photos of a few odd boards I've got lying around the house.
This looks quite a lot like a Sperry or Unisys terminal keyboard given the arrow arrangement on the left hand side.
Would you look at the single legend numbers and the placement of the parens? Very interesting.
These boards have such a great spherical profile, better than SA. Get 3D scans if you can.

I hope someone eventually makes replica key caps in this shape.
(Your Google Photos link in the OP is broken.)