Citizen Men's Black Chronograph Tachymeter Date Watch GN-4-S, 0520-S114268

I installed a new battery & watch is currently running properly. Quartz WR 100. Japan movement, stainless steel base & band. Caseback has 3 series of numbers & letters: 402220518, GN-4-S, 0520-S114268. Case is 39mm, 42mm including crown. 11mm thick. Front & back of case have clear protective covers. I didn't remove them for photos, so the pics aren't as clear as they would be without them. 20mm wide band. Luminous hands & markers. Watch comes in box with registration paper, but no user manual