This is a very old wall clock. It's made of wood and has a spring mechanism. The glass cover was not present when I obtained it. #mamezakura antique market I have confirmed that it works. I wound the spring and it ran for about two days. There is a bell inside, and when it vibrates, something moves and makes a sound. It makes a very nostalgic bell sound. The clock face is very retro and has character, making it photogenic ^ ^ Thank you for your consideration. Type...Interior