Vintage International Tractor Engine Parts Accessories Main Bearings MS - 459P STD.  This item is New. This is a brand new standard set of main bearings for a International model C tractor engine. This box is still sealed in original Perfect Circle packaging. The parts numbers from the box are MS-459P and the numbers I can read on the bearings are STD MB1649P, MB1648P, and 77-A. The box is marked made in the USA. These parts came from a local farm estate sale with a bunch of other new International tractor parts. I will combine shipping on multiple purchases when possible. Shipped USPS Priority Flat Rate Mail.