Four companies that I know of did these block style tail -- Seguso VdA, Archimede Seguso, VAMSA, and Barovier & Toso. Others may have, too. The color in the middle of the tail makes me favor Barovier & Toso or VAMSA, but the label, bill, and size makes me favor Seguso VdA. It could just be a stock label, though, so not be any help in attributing. I can tell that it is old -- late 1930-40s most likely.