Can you help to identify these frames, bikes or parts?

Following Rik's advice I've finally gotten around to taking some detailed pics of the track ends and seat stay areas of my mystery frame. Before it goes on the 'bay as an unknown, does anyone recognise anything about the frame? I've had a look through as many 60s/70s catalogues as I can find but have got nothing so far!

^^ The best thing you have to go on are the track ends - the seatstays meet the ends a long way back and the shape's pretty odd too - if you can get a match for those you're well on your way. - Flickr searches as well as Google image can be quite useful for finding a match

I have an early 60's Bob Jackson track frame - no. 4339 (1964) - it has standard campagnolo track ends (same lugs though - prugnat I think) so the date's probably fairly accurate.

The serial# format can also help to eliminate possibilities (the mass producers tended to have alphanumeric or relatively long serial#'s) and some builders had month/year type serials, it's also worth checking kilgariff's pages to quickly see if it's a holdsworth or claud butler.

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