[CR]Need a timeline lesson

Example: Books:Ron Kitching

Date: Fri, 4 Nov 2005 16:48:08 -0500 (EST)
From: wheelman@nac.net
To: classicrendezvous@bikelist.org
Subject: [CR]Need a timeline lesson

When did rear derailleur hangers come into play. I have seen recently several bikes listed on ebay as being from the 50s with hangers and it does not sit well with me yet. Perhaps I just need more education.

Ray Homiski
Elizabeth, NJ