> -----Original Message-----
> From: Toshihiro Sugimoto [SMTP:sugimoto@xxxxxxxxxxx]
> Sent: Friday, October 02, 1998 6:22 PM
> To: olympus@xxxxxxxxxxxxxxx
> Cc: sugimoto@xxxxxxxxxxx
> Subject: [OM] A chronological survey of OM-1(md)
>
> John, I may be wrong. Please point out if so.:-)
>
> According to the 'official' history on Olympus home page;
> <http://www.olympus.co.jp/Special/CameraHistory/camera.html>
> in Japanese (Sorry for most of this list members),
>
> 1972.7 M-1
> 1973.5 OM-1
> 1974.10 OM-1MD
> 1979.3 OM-1N
>
> About one and a half year ago, a volunteer in a Japanese Olympus
> users' group (MXA00643@xxxxxxxxxxx) tried to survey the difference
> between OM-1 series bodies out of about 30 users' samples.
>
> He concluded that apart from very minor changes there is at least one
> major change or reform in OM-1's inner mechanism. If we look into the
> front lens mount, we may see a small (3mm in diameter) round cam at
> upper right corner. Then this is the early version of OM-1(MD). If you
> can't find it, it is the later version. (This cam moves in connection
> to the aperture ring when lens is mounted.)
> This reform was introduced after OM-1MD started. So, OM-1MD have
> either this early mechanism or the later one.
> Judging from those samples' serial numbers, some time after the
> mechanism was changed, Olympus stripped "MD" label and continued to
> sell OM-1 without "MD" but with md-ability until OM-1N was introduced.
> (At the same time when OM-1MD was introduced, Olympus offered us an
> modification service for OM-1 to put md-ability at cost.)
>
>
This explains my OM-1 & OM-1MD bodies precisely. So the non-MD is
really a newer body - this tallies with the serial numbers.
Thanks,
Wayne
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