The oldest one I have is a Rimmel called Drop of Sherry - blogged it a while back and was still in good condition. I think I bought it in the early to mid 90s. I have been painting since I was roughly 8 and now 41. I stole a bottle of my gran's polish and that is how it all started.
The oldest ones I used I've finished so was hard to find my oldest that I still have. I'll check that polish out.
'If you can't say something nice, dont say nothing at all" - Thumper