I have yet to find a document providing accurate specifications of the movement in this hexagonal Jaeger LeCoultre desk clock.
Looking under the press-on back cover no movement caliber number can easily be seen. Combining a few auction house catalog texts the movement is described as;
45mm JLC cal. 222, rhodium-plated, 15 jewels, straight line lever escapement, monometallic balance, self-compensating flat balance spring, index regulator.
