[CR] Q for Simplex Ologists ??

Example: Books

To: <classicrendezvous@bikelist.org>
Date: Thu, 30 Jul 2009 09:21:47 -0700
From: donald gillies <gillies@ece.ubc.ca>
Subject: [CR] Q for Simplex Ologists ??

Robert Broderick's excellent catalogue collection has gotten me confused.

http://www.velo-pages.com/main.php?g2_itemId=20041 http://www.velo-pages.com/main.php?g2_itemId=20075

In the 1972 catalogue supplement and the 1974 catalog, I see pictures of the all-metal SLJ 5000 model (like Campagnolo Nuovo Record), but both catalogue pages say, "PRESTIGE SUPER L.J. AR. 615". In some other french-language catalogues, I see "SLJ 5000". Did Simplex have 2 different serial numbers for their L.J. derailleurs? If so, when did the numbering change (sometime in 1975?)

- Don Gillies
San Diego, CA, USA