DrT,
I lifted this from Lee Hawkins website where he explains (courtesy of our
own John Hermanson) the code under the pressure plate:
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
Yours with Z32 should be Factory "Z" 1973 February. Is there no plate
number?
Charlie
On Wed, Aug 19, 2009 at 9:44 AM, DrT (George Themelis) <drt-3d@xxxxxxx>wrote:
> Hi, I am back! (out of digest)
>
> I got an OM1 and I was surprised to find that it is not motor-drive/winder
> "ready". The serial number is T55746. I removed the pressure plate
> (thanks
> to the Dutch friend who told me about this) and it is stamped Z 3 2.
>
> Can someone tell me when this was produced and if it is a newer model?
>
> Related question: Are there any numbers of how many different cameras from
> each model were produced? Just looking at ebay sales, it seems that the
> most
> common Olympus is the OM1, followed by OM10.
>
> George
>
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