I know this is a bit of an odd one for on here, but thought I'd give it a shot anyway. :)
Antique probably isn't quite the right word, not sure - it's circa 50 years old I believe.
I took this in px when I sold a car some time ago, gave the equivalent of £600 off the car at the time as that's what a local jeweller estimated the value to be (not a fomal valuation though).
Stone appears to be Peruzzi cut.
Believe it's platinum mounting.
Anyway, with something like this pictures really are everything, so I'll get one up ASAP. :)
BT, cash on collection or would consider a cheque (given the value) - to clear first.
As ever, prepared to consider trades for WHY?