The three-legged one was the 'drone' style, and the metal one is similar to the kit we bought on Ebay! I can't find the plastic one anywhere, but we got it in that fabulous cookery shop in Monson Rd, T.Wells, some years ago!
They're both great for parmesan although Mrs Growster prefers the knuckle-shredder type still!
I bought a mandolin with multi-blades recently, and while it's well made, it makes such a mess, we use these bits of kit instead! It's possibly because I attack the blades with a bunch of bananas instead of a slow-hand...
Like your passata machine, Mum! While we often reduce blitzed toms and freeze them, it never seems the same as the real thing you make. Puree, while cheap, can get a bit overpowering if the same bunches of bananas try to get the absolute last tiny drop out of the tube with the help of a hammer, a vice and a pair of scissors to cut open the top for the final milligram...