Bristol M.1 - version overview
M.1A - prototype, a single-seat monoplane built as a private initiative by Bristol
M.1B - four armed machines ordered by the British government for type evaluation
M.1C - production version, 125 built
M.1D - one machine, converted to a Bristol Lucifer engine flying test bed
Source:
Barnes, C. H. Bristol Aircraft Since 1910, Putnam Aeronautical Books, London 1964. ISBN 0851778232.
www.britishaircraft.co.uk/aircraftpage.php?ID=144
http://en.wikipedia.org/wiki/Bristol_M.1
M.1A - prototype, a single-seat monoplane built as a private initiative by Bristol
M.1B - four armed machines ordered by the British government for type evaluation
M.1C - production version, 125 built
M.1D - one machine, converted to a Bristol Lucifer engine flying test bed
Source:
Barnes, C. H. Bristol Aircraft Since 1910, Putnam Aeronautical Books, London 1964. ISBN 0851778232.
www.britishaircraft.co.uk/aircraftpage.php?ID=144
http://en.wikipedia.org/wiki/Bristol_M.1