A proper motor bike

Call me old fashioned, but I have a soft spot for old British motor bikes. This is an oldish BSA, not sure what date, but the kind of bike I remember being around when I was at University. This was before the light-weight Japanese bikes rode into the picture. I actually owned a 250cc BSA in 1970 (like this one here), which was sadly stolen - it was an ex-army bike with adjustable suspension and despite its clunky appearance it had a fair turn of speed.