[CR]Dating Paramount cranks

Example: Racing:Beryl Burton

Date: Fri, 21 Mar 2003 19:22:59 -0500
From: Newag@aol.com
To: classicrendezvous@bikelist.org
Subject: [CR]Dating Paramount cranks

And no, I'm not trying to be funny.

Can anyone on the list help with identifying the date of a set of Schwinn Paramount cranks?

They are on a track bike; the cranks are deeply fluted and the channels are quite square, especially at the base (near the axle) on the inside. The pedal lip is raised but this apparently is also true of similar pair of paramount cranks known to be later than the ones I'm trying to identify.

With thanks in advance,

Jonathan Agnew