Someone posted an email to the list a week or so ago about a 30s track frame they were trying to get more information on. I've looked at a few BSA cycles on British eBay and the lugwork seems to be very similar to a few BSA frames. Hopes this helps.
Regards, Peter ~~~~~
Peter W. Naiman Owner: Cream City Online. Registered Ebay Sales Broker/ Trading Assistant Glendale, WI USA 53217-5034 Phone: 414-429-4362