Aah that's what it was! I inherited a stove from a friend who said it didn't work. A quick clean and a new set of seals and it worked a treat. I knew it was a Primus but nobody I spoke to knew what it was or had ever seen one before. I just Googled Primus Grasshopper and now I know what it was. I saw was as I lent it to another mate of mine for a bike rally he was going to and it fell out of his panniers on the motorway. Thanks rik_uk3.
You can pick these up very often for almost nowt on ebay, often don't get a bit. I got a NOS (New Old Stock) for about a fiver a couple of years ago. When a young climber I stopped using paraffin Primus stoves when I got one of these !!!!! (and a Bleuet s200) and it worked really well and it was many years before the urge to start collecting old Primus paraffin stoves infected me.
I'm not trying to derail the thread but these little Primus 210 type stove are simple and work well, again they don't break the bank to buy. This youtuber is a great fella known to some here who have bought things like the Eagle kettle off him.
Wonderful video, skip it if you want but right at the end he tells you what the stove cooked on <400ml of fuel. His 'camping' style matches mine in many ways.
[video=youtube;ozgART3420Y]https://www.youtube.com/watch?v=ozgART3420Y[/video]