Thanks Moose, I know Ive seen this before. I'll be sure to save it this
time.
Darin
> Here is Piers misplaced decoder ring:
> ----------------------------------------------------------------
>
> For later OM production the manufacturing date is marked as a
> four/five-character white code usually on the rear of the lens, or in the
> film chamber on the body. The first two characters indicate the assembly
> plant, the last two/three the production year and month. The year code
> starts with A=1981 (I think, reflecting the start of assembly at the new
> Tatsuno plant).
>
> At http://lists.tako.de/html/Olympus-OM/1999-02/msg00417.html , John
> Hermanson provided this worked example: "TNE5 = Factory "TN", E = 5, 1985,
> 5
> + fifth month, May. May 1985."
>
> A later thread starts here
> http://lists.tako.de/html/Olympus-OM/2000-09/msg00983.html
>
> It appears that a further refinement was added to the code, the extra
> one/two digits (Day of assembly?) in some of the examples I have
> available
> - but I don't own all of them :(
>
> TNNC 21 OM-3Ti made in December 1994
> TNO1 12 OM-3Ti made in January 1995
> TNF54 OM-3 made in May 1986
> TNF82 OM-4Ti made in August 1986
> SUEA3 OM-PC made in October 1985
> TNF4 50/2 made in April 1986
> TNK3 50/1.2 made in March 1991
> TNI2 24/3.5 made in February 1989
> TNG8 100/2.8 made in August 1987
>
> But I have several lenses which do not have any visible code (including my
> 50/1.4 which is an early s/n 223xxx)
>
> Earlier production M-1, OM-1 and OM-2 bodies had slightly different date
> codes, which are each documented on Mark's M-1 information page
> http://olympus.dementia.org/M-1/ , and in the OM-FAQ
> http://brashear.phys.appstate.edu/lhawkins/photo/olympus.faq.html at B21
> ----------------------------------------------------------------
>
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