This is a Rotary double-faced watch. (It's reversible, with two faces, front and back.) The battery is only in the white face, and it's working. I haven't confirmed whether the black face is working. The strap is the original one from when I bought it. I'm not very knowledgeable about watches, but I think it's in pretty good condition. Returns are not accepted after purchase. [Watch Description] Rotary double-faced (double-sided) watches are mainly known as the "Revelation" series, and they are characterized by the ability to switch between two different dials (usually white and black) by rotating the case. Revelation Series The Revelation series is a wristwatch with a reversible function patented by Rotary in the 1990s. This allows you to easily change the impression of the watch to match your outfit or mood, or to use it as a dual-time watch to display two different time zones. Functions: The time of each dial is set individually with the two crowns on the side of the case. This allows you to display the time of different countries simultaneously. Design: There are models with silver-colored cases and Arabic numeral dials, models with pink gold indexes, and simple black dial models with bar indexes. Mechanism: Mainly quartz (battery-powered) movements are used. Availability: Many models are now discontinued, and they are available on flea market sites, auctions, and the used goods market. ROTARY Rotary