Construction Numbers of I-16s?

[kurlannaiskos]

I noticed the cowling was darker than the rest of the plane and at first I thought it might be black.
(a common paint scheme for early 'Moskas')
but after examining the photo a bit more I realized it was not dark enough to be black.
if the meaning of the logo means that this aircraft was repaired and/or rebuilt then it might also have been repainted also.
if that was the case then the green paint over the original black cowling (?) may have caused the green to appear darker than usual.