The rear “plungers” on the Clubman Special were an optional extra at a cost of 15 pounds (there’s no pound sign on this NZ computer). The Clubman should have cylinder wall oiling via a Pilgrim pump on the left hand crankcase door, a triangular oil tank on the rh side between the middle and upper rear frame tubes for chain oiling, two leather fronted tool boxes, a 4 1/2 gallon petrol tank, 1 1/8th Amal type 29 carb with twin float chambers, TT transfer port covers and a spring-up rear stand. The internals were specially finished to increase performance (tested by MotorCycling at 91.8 mph) and had 3 ring pistons. The prototype model also had 21″ front and 20″ rear wheels.
Below is the answer I received when I queried the frame and engine numbers of the “Clubman Special” ?? on ebay.
hi dave engine rz2390 frame 4660m the bike was bought new by a mr eric lacey of 37 east road preston hull hu12 8sd on 13 6 1939 i beleave this gent died in 2000 it was then sold to a mr david mckenzie of gardn house37 souttergate hedon hull hu12 8jr who im told never ran it it then came to me earlier this year im a velo man to the core and i know i will do nothing with it so am selling it hope this all helps in some way please make your members aware of this rare find as i would rather it went to a scott buff sooner than a get rich quick dealer dont hesitate to get in touch if i can help any further regards paul