Decode these rod and main bearings ?

Thanks for your opinions guys ! I'm assuming that they are standard bearings being this engine has not been tampered with . No aftermarket bearings like clevite and others with their stamp on them . anyone know the journal sizes off hand for the stock crank? I was looking last night and didn't find any info yet.
Oh , another thing I noticed was the oem solid lifters had a deep groove cut out around the centers of the lifter. why that instead of a solid smooth side lifter ? Oiling ?
here is a pic of the lifter that was in the commando .