Comments on: Artguywes’ 1970s Bob Jackson 3 Window

By: Azorch

Azorch — Wed, 14 Dec 2011 21:15:00 +0000

Very nice. What is the serial number on yorur Bob Jackson? I have yet to see two BJs that are the same but yours is very similar to my own and I’m curious if they are close in mfgr date as well.

By: The Ten-Speed Dreamer

The Ten-Speed Dreamer — Fri, 17 Jul 2009 15:26:22 +0000

From: http://www.worldclasscycles.com/JACKSON-HOME.htm

2/3 of the way down the page.

3 WINDOW, These Prugnaut lugs feature ornate cut outs on the head lugs and seat lug and are therefore refereed to as 3 Window lugs, These frames are built with a cast bottom bracket and Cinelli crown. These lugs are a no cost option on 531 Messina frames, and are the standard lug used on the Grand Prix, Vigorelli 531 track frame & all touring frames.

By: Bob H.

Bob H. — Fri, 17 Jul 2009 14:44:03 +0000

Why 3 Window?