Unknown crest on a Seiko Quartz 7N43-8A39 A1 I picked up second hand. Google searches don't help. Unsure if the crest is attached to the watch when it is bought. Is the
Vintage SEIKO Men's Quartz Watch 7N43-9041 - Etsy
Seiko Quartz 7N43-9041 Vintage Rare Wrist Watch Japan Date Day Gold Tone | eBay
Genuine Seiko Quartz Watch Movement 7N43 Day And Date 3:00 Overall Height 5.0mm