[CR]What vintage are these Campy skewers?

Example: Component Manufacturers:Chater-Lea

From: "Pete Rutledge" <prutledge1@comcast.net>
To: "classicrendezvous" <classicrendezvous@bikelist.org>
Date: Sun, 6 Jul 2003 10:19:31 -0400
Subject: [CR]What vintage are these Campy skewers?

I just received a pair of vinage Campy quick release skewers that I need for a vintage Campy-hubbed wheelset that should be coming soon. The non-lever end of the skewer has me wondering. It is cone-shaped with an integral knurled ring half-way up the cone. The large end of the cone says "Patent Campagnolo." There is no D-ring. Can anyone tell me the vintage of these?

Pete Rutledge
Woodbridge, VA