Skip,
The early Zuiko lenses do not have white stamp codes and started to add
these possibly in the '80s, as someone mentioned in the List, as I recall.
Also some of my early Zuiko lenses I bought in the '70s do not have
them either. Therefore, I made an assumption, like Friedr, that the
date code stamp started in 1980.
Jim Terazawa
Skip Williams wrote:
> OK, I give. Why is everyone starting their counting with 1980? The OM
> line began in 1972 or thereabouts, right?
>
> Skip
>
> At 11:17 PM 9/15/00 +0200, you wrote:
>
> >Your interpretation seems reasonable. It seems I have a ens which
> >was manufactured in another plant.
> >
> >This are the codes on some of my lenses:
> >
> >SAD3 -> 1983/Mar
> >NID7 -> 1983/Jul This is 40mm/F2.0 #6333, seems possible
> >TND8 -> 1983/Aug
> >SAEA -> 1984/Okt
> >TNEC -> 1984/Dec
> >
> >I guess they used 1-9 for Jan-Sept and A-C for Okt-Dez.
> >So If there is a code with more than a C in th last 'digit' this Theory is
> >faulted.
> >
> >When assuming the labeling started with 1980 as year A the following results:
> >
> >A 1980
> >B 81
> >C 82
> >D 83
> >E 84
> >F 1985
> >G 85
> >H 86
> >I 87
> >J 88
> >K 89
> >L 1990
> >M 91
> >N 92
> >O 93
> >P 94
> >Q 1995
> >R 96
> >S 97
> >T 98
> >U 99
> >V 2000
> >W 01
> >X 02
> >Y 03
> >Z 04
> >
> >Which could be possible. very fascinating.
> >Seems the Zuiko production is planed
> >to last until 2004 ? <g>
> >
> >Frieder Faig
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