I have found that with Bronze Green there is considerable variation, as with all WW II interior colors, and especially greens. But one thing a true bronze green has that other greens don't is a tiny hint of blue in it. Sometimes this blue is very noticeable, such as on many North American componants of the period, and sometimes it's just a tad, like on Grumman products. So for the latter, to the green I add just a couple of drops of MM French Blue or any other true blue color depending on what brand of paint I'm using. The reason it's called "bronze green" is because it resembles the patina of oxydized bronze, like the light Nile green color you get from oxydized copper (i.e., the Statue of Liberty).
TOM