OK, I'm probably going to regret this, but...
If people want to send me the serial numbers and manufacturing codes from
their OMs I'll assemble and distribute the data just as I did/am doing
for the lens coating list. It would be useful if someone (John H. or
Clint?) would post some instructions on how to get a peek behind the
pressure plate.
One possible fly in the ointment: How do we know the back on the camera
is the one it shipped with from the factory?
Fire away, people...
Paul Schings
On Fri, 20 Jul 2001 12:25:24 -0400 "Bruce Kolber"
<bkolber@xxxxxxxxxxxxxxx> writes:
> I have a OM-1n with serial number 17427xx with a pressure plate of
> #4 H97
> (July, 1979)......that should give you an idea of serial
> number/date
> Bruce Kolber
> St. Petersburg, FL 33715
> USA
> ----- Original Message -----
> From: "Garth Wood" <garth@xxxxxxxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxx>
> Sent: Friday, July 20, 2001 11:49 AM
> Subject: Re: [OM] "When was it made?" question
>
>
> > At 11:27 AM 7/20/2001 -0500, you wrote:
> > ><<<Date is either on the back of the pressure plate or in the
> film
> chamber.
> > >>>>
> > >So how you do translate TNF61? (That's in the film chamber;
> nothing on
> the
> > >back of the pressure plate)
> >
> >
> > From the FAQ:
> >
> > >B21) How can I tell when my OM-{1(N), 2(N), 10} was assembled?
> > >
> > > The serial number on an Olympus camera does *not* give
> you a
> > > precise date of manufacture. The only way to tell is to
> remove
> > > the pressure plate and look for a code either on the back
> of the
> > > pressure plate or on the back itself behind the pressure
> plate.
> > > The code consists of 4 characters:
> > >
> > > 1 Japanese character signifying the assembly
> plant.
> > > 1 number representing the last digit of the year
> of
> > > assembly (e.g. 7 = 1977, 0 = 1980).
> > > 1 number or letter representing the month of
> assembly,
> > > 1-9 for Jan-Sep, X, Y, Z for Oct-Dec.
> > > 1 number representing the pressure plate used.
> Olympus
> > > apparently used pressure plates with
> slightly
> > > different curvatures to fine-tune focus.
> > >
> > > Some examples:
> > >
> > > OM-1N - S055 factory "S", 1980, May, plate #5
> > > OM-1 - S766 factory "S", 1977, June, plate #6
> > > OM-1N - S0Y5 factory "S", 1980, November, plate
> #5
> > >
> > > Thanks to John Hermanson <omtech@xxxxxxxxx>
> >
> >
> > Mind you, it doesn't seem to help me figure out my date of
> manufacture,
> either -- my film chamber says "TNE6," but uses pressure plate #5.
> Again,
> nothing on the back pressure plate (other than its number).
> >
> > Garth
> >
> >
> > < This message was delivered via the Olympus Mailing List >
> > < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> > < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
> >
>
>
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>
>
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