Dead Beat Escape Wheel FHS 23 & 25 cm is an escape wheel specifically for Dead Beat Movements 141, 151, 241, 351, 451, 1051, 1151, 1161 and 2061. Dead Beat Escape Wheel 23 & 25 cm is specifically for movements with a pendulum length of 23 and 25 cm. Pendulum length is indicated on the plate of the clock, it is not the actual measurement of the pendulum.