This I-16 was obtained from the Hobbycraft type 24 kit, 1/48, with some scratchbuilding inside the cockpit.
The photos give an excellent idea of the kit.
 

References for this model:
Polikarpov fighters in Action part 2, by Hans-Heiri Stapfer
Polikarpov I-16 fighter of Y.Gordon and K. Dexter
Soviet Air force Fighting Colors 1941-1945 of Erik Pilawskii
Barbarossa Victims of Tomasz Kopanski
Storia dell'Aviazione
Letectvi Kosmonautika
http://www.aircraftresourcecenter.com/
http://vvs.hobbyvista.com/ModelArticles/I-16/index.php
http://www.airwar.ru/other/draw.html
http://www.airwarfareforum.com/viewtopic.php?t=3024