Thanks very much Alas, the toy I'm thinking of I had when I was 3-4 years old, and I was born in 1961, so it would have to be a vintage of around 1964-65.
The Corgi toy looks closest to what I've been describing/memory, but I don't think it looked that "Good", meaning, not quite that realistic, but what I had was certainly not a baby's toy either.
My only distinct memory are the clear plastic bubble canopy, and the tail boom which was white or off-white...wondering if perhaps it was not a Bell 47, but something similar?
Brest, Christian