Inside 2nd version of 269...

 

C269 "Second version with the small Periscope"

 

 

Difference between 2nd version (left) and first version (right) :

 

Difference between 1st version (left) and 2nd version (right) :

 

Difference between 1st version (left/down) and 2nd version (right/up) :

the 2nd version was more darker.

 

 

Difference between 1st version (left) and 2nd version (right) :