I'd like to know something more about a certain Seiko 5 Automatic. It was bought by my grandfather, when in 1983 he worked on a contract for modernization of electric installations in Baghdad, Iraq. The watch has a day/date window, displaying the day in English and French- depending on the setting, it displays every second position on the day wheel. So... is this a common movement? I also wonder, when the Seiko 5 series was introduced- there are a few generations of those, and I wonder to which one does this piece belong. Here are the pictures. I couldn't take off the case back, though.