What Is this track frame .. Please help
 

Hi i have just bought this track frame ... and i am not sure what brand it is and would really like to know more about it. The bottom Bracket shell has a V cut out of it and the serial number is CO 0343
Does anyone have an idea of what it is ? Thanks

[IMG]http://img232.imageshack.us/img232/2298/fixie.jpg http://img232.imageshack.us/img232/fixie.jpg/1/w360.png[/IMG]

[IMG]URL=http://img29.imageshack.us/i/p8240287.jpg/]http://img29.imageshack.us/img29/2981/p8240287.jpg[/URL] http://img29.imageshack.us/img29/p82...jpg/1/w640.png[/IMG]

[IMG]http://img29.imageshack.us/img29/949/p8240281.jpg http://img29.imageshack.us/img29/p82...jpg/1/w640.png[/IMG]

[IMG]http://img252.imageshack.us/img252/4629/p8240285.jpg http://img252.imageshack.us/img252/p...jpg/1/w640.png[/IMG]

[IMG]http://img12.imageshack.us/img12/6168/p8240282.jpg http://img12.imageshack.us/img12/p82...jpg/1/w640.png[/IMG]

By any chance, does that thing have English BB threading?

Those head lugs remind me of this (though they are obviously quite different at close inspection):

http://www.jaysmarine.com/rossin_detail_4.jpg

The only other frames in addition to yours (and that faux Rossin above) that I've seen with those cutouts were in this thread - a Danish Schroeder, and that black Moon frame that Unworthy1 posted:

http://www.bikeforums.net/showthread.php?t=545394

I forgot who brought it up, but one fellow did point out the pitfall of trying to ID via a circular hole drilled in a lug: It's the easiest lug modification any two-bit framebuilder can do - stick a lug under a drill press and go to town.

-Kurt

Thanks for the help is the bottom bracket shall V a common thing to have ?