I may be wrong but they just look a bit poor quality. Not saying they are or that 531 forks were picture perfect but they just don't seem right. That triangular reinforcing somehow looks wrong and isn't there a hole by it?
Looks like Cinelli MC or Haden Concord style fork crown. The drilled fork tangs are typical in that they never fitted well, the hole looks like dirt. My Falcon San Demo look like that and they are 531.
The fork crown looks too good quality for them no to be at least 531, but I must admit, the dirt / dark area under the crown does look a lot like a hole....
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Thanks for the link, I missed that one . Interesting frame, with the B on the fork crown and the cutout lugs it should be easy to identify but nothing rings a bell . The B on the forks isn't Bianchi.
Still quite a nice frame, does not look English though ?
The B on the forks indicates it's a Benotto frame, so by a quality frame builder. The long pointed tangs with the drilled holes are brazed onto the inside of the fork for extra strengthening around the fork crown. Looks like you missed out on a good one.