Earlier this week, I ordered new bearings and seals for the front end. Most were picked up today, but there is still a pair of seals that hasn't been delivered to the bearing shop.

There is a new equivelent of the seal that goes into each axle tube.

Original one, solid metal case with leather seal surface.

New one, only one sided case and seems to be made from a lightweight plastic of some sort! Feels strange to touch and VERY light.
The bearing guys tell me this is the modern version, and will perform exactly as the original, but has a synthetic seal surface. Lasts longer than original materials too.

These bearing components are replacements for both the wheel bearings/cups and the diff carrier bearings/cups.
The pinion seal, identified in the modern part nos. spreadsheet on MLU as "CR13739" is not correct. I know that for sure. Ordered that part and it's too small! Does anyone know the true part no., please?