... not the most perfect of The Rolling Stones' albums, yet its 3D cover made it an instant sought-after collector item.
After recently getting a 19 cm/s pre-recorded original tape on a 18 cm diam. plastic reel, whose box sports the VERY same 3D lenticular plastic gimmick as the vinyl 1st pressing in my possession.
Strange, I told myself...
I checked Wikipedia on the matter and found this: