Grahame-White M.1 Twin Airscrew Experimental
 
Little information has survived about this single-engined 1916 machine with a counter rotating construction of two four-bladed propellers. One was ordered as A8964 but later cancelled.
 
It could be that the designation Grahame-White M.1 originates from the contract (card) which may be held in the UK archives.
 
Pictured fully built, it was destined never to fly.