Posted: 28/05/2012 at 08:49
Tigrella has yellow/gold stripes rather than green. Are you sure about the colour of the stripes, Janie? And was it a red with green stripes?
If your memory about the size is right, I doubt it was Green Tiger because GT is closer to a cherry. I also suspect Green Tiger is an invented name for marketing purposes. Seeds aren't available via the usual commercial sources and it's sold "exclusively" through supermarkets. But the anecdotal evidence suggests that saved seeds grow true to type, suggesting it's not a hybrid, which is unusual for supermarket "exclusives". The tomato might well exist under another already established name. Tomato history is littered with the re-naming of established varieties for marketing purposes.
That you're talking about 40 years ago both helps and hinders the cause. It rules out a lot of the more recently developed bi-colours, but more than a few older varieties have also, unfortunately, disappeared.
I'll get onto some tomato fanatic friends of mine and see if they have any thoughts.