If it's NBC, it's a 'knock-off' or replica.
The original 'bird', in 1956, had 11 feathers; as did the subsequent version (beginning in 1962) and the third version from 1979 to 1986. Not until 1986 was the 6 feathered 'bird' logo introduced; and the last color (on the right) was green, not yellow.
Don.....