yes I have a 151bcd crankset on my track bike. that set has the bevel that is like the later (144bcd) record crank arms. The left crank arm I have looks different than that, the bevel is smaller on the edges making it look boxier.
I'll take some pictures tonight.
It might be a crank arm like this. http://velobase.com/ViewSingleComponent.aspx?ID=CFCF4483-7A67-4F81-86BF-E6667FE2F57D&Enum=115&AbsPos=22
This crankset is 151bcd too and i think it looks like the later 144bcd cranks. http://velobase.com/ViewSingleComponent.aspx?ID=5F6B1FE0-A554-479A-8F06-FB9832AAD00A&Enum=115&AbsPos=23
hmm, maybe i should take a closer look at the cranks on my track bike again...oh wait i've got it right here in the office...yep, no date code.
The Mafac boosters are just machined flat pieces of metal that are designed to be bolted across the pivot points of the Mafac brakes to brace them. Kinda like a strut tower brace on a car. I only found one with the frame I just got and I can't use it because the frame and fork has mounts for the brake arms that are alittle further apart than the booster was designed for.
Austin, Texas, USA
> From: kevin sayles <firstname.lastname@example.org>
\r?\n> Subject: Re: [CR] wtb:TT and BB cable clamps, campy pedal dustcap.
\r?\n> To: "classic Rendezvous" <email@example.com>
\r?\n> Date: Wednesday, February 25, 2009, 10:03 AM
\r?\n> Your Campag left hand crank sounds very much like a crank
\r?\n> from a 151 BCD chainset, so quite rare.
\r?\n> [what's a Mafac booster?]
\r?\n> cheers Kevin Sayles. Bridgwater, Somerset UK
\r?\n> ----- Original Message ----- From: "jeffrey
\r?\n> piwonka" <firstname.lastname@example.org>
\r?\n> To: "classic rendezvous"
\r?\n> Sent: Wednesday, February 25, 2009 3:21 PM
\r?\n> Subject: [CR] wtb:TT and BB cable clamps, campy pedal
\r?\n> > I'm looking for a few small parts and figure
\r?\n> I'll give the list a try first.
\r?\n> > For the touring frame I found my GF, I need two or
\r?\n> three top tube cable clamps for the brake cable.
\r?\n> > For the same frame, I also need a clamp on bottom
\r?\n> bracket cable clamp for the derailleur cables.
\r?\n> > For one of my bikes, I need a single dustcap for a
\r?\n> campy pedal. It had an MKS cap when I got them and now that
\r?\n> thing is gone...
\r?\n> > Possible trade items:
\r?\n> > Does anyone need a new in package Mafac booster? It
\r?\n> came with the frame and I can't use it (spacing is wrong
\r?\n> for the mounts on the frame).
\r?\n> > Also, I have an old left Campagnolo crank arm. No date
\r?\n> code. seems to have a smaller bevel along the edges than the
\r?\n> later cranks but has no raised lip at the pedal hole.
\r?\n> > Thanks,
\r?\n> > Jeff Piwonka
\r?\n> > Austin, Texas, USA