[CR]Holdsworth age clues?

(Example: Events:Cirque du Cyclisme)

Date: Tue, 30 Oct 2001 09:42:27 -0600
From: "Ron Cooley" <cooleyr@duke.usask.ca>
To: classicrendezvous@bikelist.org
Organization: University of Saskatchewan
References: <CATFOOD84dqBHksQ6KL00000d2f@catfood.nt.phred.org>
Subject: [CR]Holdsworth age clues?

Hi Everyone

I'm looking at a rather tired Holdsworth frame as a possible winter project. I'm wondering about the best way to determine its age? I notice Dale's bike on the CR page has the wraparound stays, but the '78 bikes appear not to. Did they drop them in the mid 70s? Is there a date code in the serial number? General reflections and cautions from Holdsworth owners also welcome.

Ron Cooley