I have a globe front sight that is missing the inserts. The diameter of the insert is .550 with the two tabs on the centerline with a diameter of .675. My problem is the manufactures do not display the interior of the sights diameter. I think this one may have come from England, and there is no marking as who the manufacture is. Might be BSA. Would like to find a set of inserts for this front sight. Anyone have any setting around they could measure? Best regards, the toolman.