main bearing for 73 buffalo

[two-stroke-brit]

hi all,i had trouble locating the "special"brg so i tried two different sorces and ended up with two.
so i have two bearings with the oil groove part #09262-30013.
one has an oil lip on the side of the main race with a number DG3078 C-9 in the sideof thr brg,
The other has no lip and number DG3078 DN-9 on the side.
the other three brgs also have the lip.
is this a model change/update thing .
which is correct for the year i have 73.
engine number 37858
any info is helpfull.
thanks mark