Homeloo Twemco German Quartz Calendar Wall Flip Clock BQ 170 (White) Twemco clocks are manufactured with the highest quality and reliability. The standard calendar clock used in banks the world over. Invention patented. Cases: Injection molded ABS case with supreme acrylic glass cover Number plate: material and paints from Japan, ever-lasting white Perpetual Calendar : Automatic re-setting, even for leap years. Dimension: 335 x 380 x 118 mm