Hi Darryn

Yeah I know the ones, theres still a few sets of those I've seen around the traps. I'll have a look at mine just to sure how old they are, I think the manufacture date is etched into them somewhere. But mine were probably bought not long after they came out. Just check on the trailing edge of yours, up near the top, they might have the date etched (by hand with a engraver, very small writing) then you'll know exactly how old they, not that it probably matters, but just for arguments sake.