The A639 is a very simple choronograph movement. However it's not as commonly seen out there people wearing it.
And a design like the one in the photo is rarely seen. A gold-plated bezel, sits on a full stainless steel casing. Then with all four gold plated pushers. The overall looks spectacular and set itself apart from the rest of the other vintage Seiko digital watches.
Eric has been a gadget lover for decades and had been collecting affordable vintage since the nineties. With his passion for vintage watches, he had been sharing thoughts and photos in interest groups, with his intention of raising public interests on forgotten classics.