Herb,
Robert A. Mann (on these forums as Rambertsan) compiled a book "The B-29 Superfortress A Comprehensive Registry of the Planes and Their Missions" published by McFarland & Co, ISBN 0-7864-1787-0 which lists all production B-29s. Bob has done exhaustive research on the subject and he has listed 3,960 B-29s. This was the number of B-29s manufactured.
I don't know or why specific tail codes were selected for bomb groups.
Regarding the Laden Maiden; I believe it was serial number 42-63669. This is the serial number of the aircraft that Capt Frey flew on several documented missions and the number that shows in the abbreviated history as "his" aircraft.
I need to do some more research as my 315th BW history books shows Capt Frey in the 21st Bomb Squadron and Mike's dad in the 41st Bomb Squadron. Most of the names from the original picture Mike posted show as 41st BS members. Could be a typo in the book.
Also, Mike, would you be willing to send me or allow me to use the photos you posted here on the 315th web page? Any other photos would be welcome as well.
<message edited by LarryJ on 09/18/2006 01:45:42 AM >