The cranks on the Falcon have the more rounded-corner look that didn't show
up until the early 1970's, so my guess is 144's.
David Feldman
----------
>From: "swampmtn" <swampmtn@siscom.net>
>To: <Classicrendezvous@bikelist.org>
>Subject: Re: 151 v 144 Campy cranks, wasRe: [Classicrendezvous] Campy Crankset
>Date: Sun, Oct 22, 2000, 4:43 PM
>
>The change from 151 to 144 was probably later than that... Schwinn Paramount
>road bikes still had 151bcd at least as late as 1968.
>
>As for the bike in question, the poor quality of the pictures makes it
>impossible to tell where the bolts are in relation to the inner dia of the
>chainring.
>
>Aldo Ross
>
>----- Original Message -----
>From: Harvey M Sachs <sachs@erols.com>
>To: <Philcycles@aol.com>; <roydrink@mac.com>;
><Classicrendezvous@bikelist.org>
>Sent: Sunday, October 22, 2000 7:31 PM
>Subject: 151 v 144 Campy cranks, wasRe: [Classicrendezvous] Campy Crankset
>
>
>> Fortunately, there is a good visual cue to discriminate the 144 from the
>> 151. With the 144, the inner edge of the mounting bolt is only about 1 mm
>> from the shoulder on the spider. With the 151 mm circle, the same
>> measurement is about 4.5 mm, or 3/16" inch. The eye picks this up very
>> easily. This is particularly easy to spot if you just look at the
>> chainring, which will have the big gap between the inner edge and the
>> mountinb bolt for the 151 circle, and almost nothing for the 144. The
>> shoulder on the web, and the inner diameter of the inside reinforcement on
>> the chainring, are the same for both series.
>>
>> A couple of other notes:
>> --> I think that the transition on the ROAD cranks was about 1964 +/1 a
>> year or so. Track cranks continued the 151 circle for many years.
>> --> 151 road rings are much less common. Downright rare,
>> even. Particularly in smaller sizes (44 was the smallest offered, I
>> believe), because most riders of the day used half-step with sets like
>> 49/52 or 47/50.
>>
>> Enjoy!
>> Harvey Sachs
>> McLean VA, where the weekend was wonderful for riding