1890 COVENTRY MACHINISTS’ Co SWIFT DIAMOND SAFETYModel C. 20″ Frame. 30″ Wheels.32.5″ Standover height (ground to top of top tube)Frame No 97991The Coventry Machinists’ Co introduced their new diamond frame model in 1890 to replace their crossframe, and it immediately became a top selling safety bicycle, both in Brita..