I bought one of these at the weekend to put on my Bianchi P-R as Ive given up with trying to find the spider at the moment (I have a NOS Bianchi chainwheel!) it is the same model as went on the Thanet Silverlight of the early 1950s - it has 5 double blades in a pentagram-ish shape, a goldy brown coloured splined axle and chrome/steel captive allen headed studs to pull the splined cranks onto the splines - so far so good (will undoubtedly become a problem when I find the axle is too short! but that may be another story...) oh and the cups are italian thread as to be expected...
Does anyone know: are the right hand and left hand counterbored threads on the axle of a dif diameter as one stud fits and one doesnt (or is one lh and one rh thread - if so I have three studs exactly the same that only fit one side arrgghh!) if anyone can enlighten me I can send them a jpeg of the offending articles... cos this bike is destined to only ever have one crank the way this is going on...
In anticipation ...
Regards Mike :7)