[Boatanchors] Bearing identification

[Brian A Clarke]

Hi folks,

Please help me identify some late 1970s ball bearings 
before I open the packs and possibly ruin the preservative. 

The bearings are in small cans, like the jam we used to 
see for C rations - about 1.25" tall, 2.25" diameter. All the 
cans have 1 EA A-1A5; PRES  MIL-B-197D; LUB W/MOBIL #28. 

The differences are:
One can type has WEST P/N-P8C7719-10-909C595-16
The other type has WEST P/N-P8C7706-21-909C595-48

I've tried Google - nothing found.

73 de Brian, VK2GCE