Are these Pirelli Glass by any chance? The excellent Scotland's Glass website show similar ones described as Pirelli Glass - Vasart reseller (1959).
Mine came as a pair in what might be their original box. However the box has a barcode underneath which if original to the contents, dates them any time back to the late 70s when barcodes were introduced in the U.K. I think. The light blue one has RC2023 impressed on the underside of the metal and is slightly larger, and heavier than the other.
Haven't a clue who actually made them and just thought Scottish when I first saw them, without knowing anything about these objects.
TIA
