Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 22300160 found under Spring Chronograph by Waltham Aircraft Clock Corp. The National Stock Number assigned to this part is 5360007992965, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 22300160.