A rare and historically significant 1926 HRD 499cc Model 90 from The David Plant Collection is set to cross the block at the Bonhams Spring Stafford Sale, held at the International Classic MotorCycle Show, Stafford, on April 25–26 (sponsored by Carole Nash). Registered as MN 4448 (Isle of Man), this Vintage-era HRD carries frame number…
