British Bronze Green is correct for a British vehicle of the 1960's, but it was never regarded as NATO Green. NATO vehicle colors were not standardized until the 1980's, with the British using a color virtually the same as 34079 Forest Green and Black.
Since Bronze Green is a gloss color, you can easily have your local automotive paint supplier mix it up with just a sample. I could help you with a sample if need be as I have several new parts of that era in original color.
Alan