Ryan,

I think those are just assembly numbers and don't match the serial numbers. If the receiver markings are still on the gun, there may not be a Sedgley serial on it. When they removed the receiver markings they usually added their serial in the groove behind the sear on the tang (visable when the bolt is removed)plus on the back of the bolt handle. On those with the SA or RI numbers remaining, they usually added that number to the back of the bolt handle.
Dan