The Bulova E100 watch movement is an American made mechanical movement with a diameter of 18 lignes. The movement features a balance wheel, pallet fork, and escape wheel that work together to regulate the timekeeping accuracy. It utilizes a stem winding mechanism for manual winding and a lever escapement for precise timekeeping. Additionally, the movement has shocks and jewels incorporated to enhance its durability and minimize friction. The Bulova E100 movement does not include any other functions beyond those mentioned.