One brand new sealed Rayovac SR626SW (377) watch battery. 1.55v silver oxide,also known as Duracell 377, Duracell D377, Energizer 377, LR626, Panasonic SP377, Renata 377, Sony SR626SW, Timex BA, Toshiba SR626SW, ag4, ag 4, ag-4, AG4, AG-4, Varta V377, Bulova 606, AG4, GA4, A-G4, LR626-177, 177, Citizen 280-39, D377, 565, BA, Seiko SB-AW, S626E, LR626, SR626, SR626SW, GP377, SR66.