SEIKO PROSPEX SRP639K1 BABYTUNA ORIGINAL UNBOXING *BEST SELLER - YouTube
Seiko srp639k1. She's brand new and I can't stop looking at her. My first seiko, first automatic and the fourth watch in my humble watch collection. : r/JapaneseWatches
Minty Seiko SRP639K1 Yellow Fin Baby Tuna Now with X-Tras | WatchUSeek Watch Forums
Seiko srp639 “baby tuna” still a great value watch - YouTube