got two trans...

1.
case no; 5 113 301 103
stamping; 579303

2.
case no; 35 113 301 103 B
stamping; 8122358

BTW, both casing are corroded, the first very badly. I'm just trying to figure out if there is anything useful in there that I can keep. trying to put together a back axle for a 60' SC bus that's being converted to straight axle.

I've looked on the US sites but there are no letters on my cases, so I'm at a loss. Did we have a completely different numbering system out here?