The Duracell 377, silver oxide watch battery offers the quality long-lasting power that is expected and always delivered from any Duracell product. You can be assured that this battery is at the top of its range and always reliable. Also known as V377, D377, 606, BA, 280-39, SB-AW, SR66, SR626, GP377 & V565 & AG4. - These batteries are used in a massive variety of watches from low-drain to high-drain, giving them long lasting power and durability.