I know you're not going to believe this Reg, I've not been lurking, but I've just stopped for coffee and saw Martin's last clue and bingo!
biplane | 1923 | 0675 | Flight Archive Mercedes
Edited to say that if I hadn't typed the first paragraph
Well done mate! BTW, re Graemes biplane yesterday morning, all I did was put "60 built" French Biplane into Wiki and there were three returns and only one actually French.