The British Tradition seemed to be built starting February 1999. They all are dark green (307 I think), Champagne Napa leather with green piping on the seats. 16in cross spoke wheels, green convertible top(hood). Wood trim. 5speed manual I believe.
That said, my Z appeared to meet all those criteria and the vin info says it’s a British Tradition but I’m sure that it’s not all original at this point. My paint is original color but not the original paint in all areas. I think my car must have lost a left side mirror because the mounting spacer is “Boston green” whilst the mirror is original dark green. Starting this journey and learning a lot. Car goes to my mechanic tomorrow to see what need immediate attention and what can wait.