Items 1 - 60 of 7222 - Clock Repair & Replacement Parts - Four-Hundred Day Clock Parts. Quartz Clock Movements Mechanism Parts, 3/ 25 Inch Maximum Dial Thickness, 1/2 Inch. I have a part number on my old insert - will that help? The Eight Strokes of the clock, in order to cut it up into three parts. Bistable 555 - 8-bit computer clock - part 2.