*** Posted by Luke ***
The question is about canopy.
As you know, the canopy of F-16 Fighting Falcon is coated with gold.

I have found some variants of canopy as follows;
1: All glass area is coated
2: Only front canopy is coated. Rear part is normal glass.
3: All glass area is not coated (normal glass)

Are these variants caused by different product-blocks ? Or no concerned ?