the shading and coloring seem to be pretty good technique, and the lettering is amazing
(Thanks to Steve for the color photo!) http://346bg.com/461/
This is the B 29 Slave Girl, explaining the chains.
Assigned to the 307th BW, 372nd BS: damaged by MiG-15s over Namsi Airfield, North Korea Oct 23, 1951. Able to fly back to "friendly territory" in South Korea, but crash-landed at K-14 Kimpo AB, South Korea, sustained substantial damage. 12 crew injured but survived.
A book written by Lt. Col. Earl J. McGill (USAF Ret.) provides insight into Black Tuesday. His book is entitled: Black Tuesday Over Namsi: B-29s vs MiGs - The Forgotten Air Battle of the Korean War, 23 October 1951. Order information for the book can be found at the end of this sketch.
An hour and a half before sunup, nine B-29s of the 307th Bombardment Wing lifted off from Kadena Air Force Base, Okinawa on a bombing mission against Namsi, a North Korean airfield under construction in the heart of MiG Alley. Five and a half hours later, they would engage in an air battle that would forever change the conduct of strategic aerial bombardment. Six of the nine would not return; the highest percentage of United States bombers ever lost on a major mission.
and it looks like the same artist did the whole squadron, or bomber group 6, 313 wing, Tinian, WW2