I'm guessing '91. Seiko acquired Pulsar in '80, so it's possibly December of '81, but more likely '91. The case does show a bit of wear still, couldn't polish it all out or I would start to get through the plating. The dual shows a slight patina up at the top that's hard to see in the photos, gives it a nice aged look. The original gold plated stretch bracelet was a bit too worn fory taste. so I replaced it with this unworn Hadley Roma. I'll include the original, but I wouldn't want to wear it. The acrylic crystal polished out nicely. Uses a Seiko 1N01 quartz movement which keeps time well, new battery 03/18/26. Overall very good condition for the age, nice piece.