In the 70s, Oris used in house high quality movements into its watches. This Oris Star automatic 25 jewels runs cal. 648. This movement was used in the mid-70s so the watch dates from that period. What makes this Oris Star rarer than others is that the days of the week are displayed on the opposite side of the date. Movement serviced and working accurate.
The watch is very massive, it is made entirely of stainless steel, the crown is signed with Oris, clasp also have Oris sign.
All macro images show watch in smalest details from all angles, what you see on them is hard to see with the naked eye. Quality and massive retro watch.