For an update on two survivng Skink turrets, see
AFV News board > BLUE SKINK TURRETS.
See
http://s87.photobucket.com/albums/k130/ldshrecceboy/ for recceboy's pictures.
These turrets have casting numbers 80 (in background) and 81 on the back of the turrets. They have much less damage than for example casting number 78 shown above. Although these are unmachined, these are a good basis for the recreation of a Skink turret on a Grizzly hull.