Alan,
We do now know BS built 1000 Gold/Chrome tanked GTOs for 1970. The final batch built for 1971 consisted of at least 1000 White/Black stripe GTOs but serial numbers suggest there may have been more, the balance being the Gold/black stripe GTRs to give a 71 total of 2000.
I know of 6 complete GTOs in the UK, including yours, so suggest there could be maybe 12 or so in the UK. Odd ones keep appearing. I've heard or read of others but you may now have those
well done.
It's generally suggested one in 10 of the original 350 machines now survive, who knows? That would suggest 200+ GTOs now in existence.
They are certainly rare and unusual in the UK.
Value ?............. Fully restored in concours condition, maybe £7-8000 in the UK but in reality whatever someone is prepared to pay for it. GTRs have gone for more
Great workshop, by the way, knew those plastic cups would come in handy for something ! but someone's stolen your fridge contents
Brian