N-3C Gun Site

[LT4]

Hi Gents, I am searching for some good pics of the gun site used on a P-40E. I believe it is the N-3C. I have searched the net for hours and came up with 1 pic. I am trying to model one for my R/C P-40.

Thanks, LT4

[Old SAR pilot]

Couple of angles on one here:
http://gunsight.jp/b/english/data/sight-e-aa.htm

R/C sights here:
http://www.rcfinaltouch.com/PictureGallery.aspx