The Record Book relates to the day to day running of 617 Squadron from the 1st April 1943 to 16th April 1945.
http://www.dambusters.org.uk/docs/recordbook.pdf#search="Operational Record Books"
Enjoy, v2
http://www.dambusters.org.uk/docs/recordbook.pdf#search="Operational Record Books"
Enjoy, v2