[OM] Initials before Zuiko?

[Darin Rhein]

Hello all,

Can anyone tell me what these initials; ie, E. Zuiko, F. Zuiko, G. Zuiko mean?
I've been curious about this for a while, but I haven't had the guts to ask.

Also, are all multi-coated Zuiko lenses marked MC?

TIA,
Darin.
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