When Seiko reissued the 1980s-style “Aliens” Giugiaro watches between 2013 and 2015, collectors were thrilled. But after thoroughly exhausting color combinations on the “Ripley” and “Bishop” watches, where would Seiko go next? They turned to the less well-known 7A28-7A00 SBBJ “Speed Master” series, with angled faces inside a round case.