Thanks mate! Yeah I was thinking Casio. It just looks like one. But just can't work out if it's old school (probably not knowing Walter - wouldn't be accurate enough) or new retro. Then again, Walt strikes me as the sort of guy who bought it years ago because it ticked all the boxes and he can't see the point of parting with it for something new which is poorly made just because it's new. I reckon its oldish.
I must try and get a good still and shop around.
Ummmmmm - if you mate is up for adventure, I have cancer and need money (well, not really cancer. Just sometimes a bit of flu) But I do need money. And I can be quite dangerous....

really....
