The Keystone B-6 was a biplane bomber developed by the Keystone Aircraft company for the United States Army Air Corps. In 1931, the United States Army...

The Keystone B-4 was a biplane bomber, built by the Keystone Aircraft company for the United States Army Air Corps. Originally ordered by the United States...

The Keystone B-3A was a bomber aircraft developed for the United States Army Air Corps by Keystone Aircraft in the late 1920s. The B-3 was originally ordered...

Keystone B-5 is a light bomber made by the Keystone Aircraft company for the United States Army Air Corps in the early 1930s. The B-5A was a Keystone...

The Keystone LB-6 and LB-7 were 1920s American light bombers, built by the Keystone Aircraft company for the United States Army Air Corps, called Panther...

the Mazda B engine series Blackburn B.6 Shark, a British 1930s torpedo bomber Keystone B-6, a United States Army Air Corps bomber Lohner B.VI, an Austro-Hungarian...

Keystone Aircraft Corporation was an early American airplane manufacturer. Headquartered in Bristol, Pennsylvania, the company was formed as "Ogdensburg...

military aircraft of the United States Northrop Grumman B-21 Raider, US heavy bomber under development "B-17G Flying Fortress". Air Mobility Command Museum...

B-1 – Huff-Daland/Keystone B-2 Condor – Curtiss B-3 – Keystone B-4 – Keystone B-5 – Keystone B-6 – Keystone B-7 – Douglas B-8 – Fokker B-9 – Boeing B-10...

Aircraft employed in carrying the mail were the Curtiss B-2 Condor, Keystone B-4, Keystone B-6, Douglas Y1B-7 and YB-10 bombers; the Boeing P-12 and P-6E...