NOTE: OS can sometimes be confusing in the way they mark-up the part numbers and description on there packaging.
For example; when you check the engine parts list that comes with the engine the OS Numbers for example show the following;
OS 46AX (Crankshaft Bearing R) #26730040 (from the manual)
OS 46AX II (Crankshaft Bearing R) #26730005 (from the manual)
The picture above describes the Rear Bearing as being suitable for the 46AX (not the 46AX II) however the part number matches that of the 46AX II Manual.
This is why I wan't the actual number from the bearing itself.