Get 15% OFF For Seiko Excludes Sale Items. With coupon code: AFFSEIKO15 at Ashford.com. Offer Expires: 11/30 at 11:59 pm. More Considered the only watch manufacturer with watchmaking expertise in every category, the Japanese company Seiko was created in 1881. Seiko was the inventor of the quartz movement, which changed the history of timekeeping as we know it.