Was at a friend's shop earlier today.
He pulled out two(2) 12 Bolt axle housings.
One was coded BL 1220G1 ( no E below )
Dated K-8-7
The other was this:
C BS 0930G2
.........E <-----E being under the 9
Date coded I-26-9
Center casting number of 3969341 NF
What does he have???