Which didn't really work as I didn't have quite enough turns in the spirals and started them in the wrong place, so it doesn't lie open & flat and it doesn't look great when fully closed. And I'm not convinced the double-sided colourway really works either.
But at certain angles ie half open (or with your eyes closed chortle) it's really rather fine.... It's quite interesting to look through.
The self decorated paper is gouache on heavyweight watercolour paper, which made it difficult to make spiral cuts neatly (ie they aren't), but it stands up nicely (or would if it didn't have a random crease in the back from the sheet being carelessly stuffed into a storage box)
I'm going to mull over this one, with a bit of thought it could probably work as a card; so I might try again in a month or so.