- Development
- Engine installation
- Fixed armament
- That "kidney-shaped" lump on the right side of the forward fuselage
- Canopy design
- Hydraulics
- Armor
- Formation lights
- Assistant pilot's flexible machine gun
- Norden bomb sight installation
- Gunner's installation
- Radio revisions
- Both approach light configurations
- Mark XLII bomb racks
- Wing folds
- Floatation gear
- Main gear strut revisions
- Production deliveries
- Paint schemes
- Squadron histories
- Wartime record
Additionally, the photos have been copied at very high resolution, and they're printed large, generally one to a page - you can see all the details.