[OM] when did 35/2.8 shift go MC?

[Johnsonpa]

I checked the FAQ and have the approximate date, but does anybody know 
approximate serial numbers for the MC version?

Here are the two listed in the FAQ
Focal Aperture     S/N     Chrome/   Coating MarkedMC? Lens Name
35        2.8          102700  Black         SC          No          Zuiko 
Shift
35        2.8          109200  Black         SC          No          Zuiko 
Shift

thanks
--p.j.