Interesting to read about the combined oil filled and sight glass - apparently there is a bowl and drip feed under a glass filler lid, which somehow swings out of the way when it's time to fill the oil tank.
Tempting to say the rear carrier is missing, but on p33 of the parts list there is a set of mudguard stays "if required". So maybe the stays are original. Back stand is missing. Love the Dunelt-specific flanged hubs with 4 7/8" drums.
Quirky little bike, even before we get to Professor Supercharge's stepped piston.
Leon