Rare For Part Mechanism. These mechanism for Parts. The mechanism is in working order. The chronograph function is working. Requires cleaning, adjustment, oil change. I did not check the accuracy of the move. I bring to your attention rare vintage mechanism Chronograph. Actually mechanism it is much more beautiful than on a photo. Buttons with springs as a gift. Diameter of mechanism: 30 mm. I guarantee you complete satisfaction with all my high quality watches. Please, before the offer of the price closely examine photos. All pictures are actual, you receive what you see! THANK YOU FOR LOOKING!