Hi Tom,
There's at least two different designs for Legnano bolts. One is for bikes without a saw-cut at the lug, the other works for bikes with a saw-cut.
The one you describe is indeed like a Legnano bolt for bikes without a saw-cut - the bolt clamps around the seattube.
The other design has a bolt with a cresent cut-out, but without the bit that slips over the end - the bolt pinches the lug together, which clamps the seatpost.
At least that's how I remember it.
Regards,
Aldo Ross
Blue Ball, Ohio
> Could someone please let me know if what I am about to describe fits the
> description for a seatpost binder bolt for a Legnano that binds in front
of
> the seattube?
>
> It looks almost like a crank cotter pin: one end has threads on it and the
> other end has a piece looking like a cotter pin except beveled in way to
fit
> next to the seatpost. There is another piece that corresponds in shape
and
> size to the end piece on bolt-cotterpin looking piece. This piece, also
> beveled, slips onto the other piece and then is tightened with a nut.
> Regardless of whether autthentic or not, it works; that's important.
Never
> having taken the oppportunity to examine one, I would like to know whether
> this piece is the "right" one or a homemade one.
>
> Thank you.
>
> Cheers.
>
> Tom Hayes
> Chagrin Falls, Ohio