• http://www.wrn.com Bob H.

    Why 3 Window?

    • http://oldtenspeedgallery.com The Ten-Speed Dreamer

      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.

  • Azorch

    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.