Raleigh SBDU built some lovely track frames with Cinelli lugs & BB shells, so could be a possibility. They usually go for serious monies too.
Definitely not an SBDU. They have distinctive features and definitely no Italian threads. It's a nice mystery Italian frameset.
@lesterama started
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Raleigh SBDU built some lovely track frames with Cinelli lugs & BB shells, so could be a possibility. They usually go for serious monies too.