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@gbj_tester
@apollo, re Campag BB:
I'm guessing an early version of AC-H, for Daytona/Centaur/Athena/Chorus. There are four basic versions of the FAG/Campag cartridge BB
SC-S steel cups, solid axle
SC-H steel cups, hollow axle
AC-S alloy cups, solid axle
AC-H alloy cups, hollow axle
In general, the solid axles are black and the hollow ones are silver. Assuming you're looking to buy this, ask the seller what the cup material is and whether he can see through the axle if you want to know which letters to assign to it but really it is much less important which one it is than how good the condition is.