You may already have seen this, more on centre-weighting and OM-2,
from The Olympus OM SLR FAQ
(http://brashear.phys.appstate.edu/lhawkins/photo/olympus.faq.html):
B24) Are there two different versions of the OM-2?
Yes, there are. Sometime in the late '70s the dot pattern on
the first shutter curtain was changed. The effect of this
change was to change the metering pattern to be less
dramatically center weighted. The only way to tell which
version you have is by looking at the first curtain (remove the
batteries and fire the shutter to lock up the mirror). If the
dots are concentrated near the center, you have the old version.
If they are more spread out, you have the new version. See
the following web page for pictures of the two different
screens:
http://brashear.phys.appstate.edu/lhawkins/photo/om2-curtains.shtml
To unlock your mirror, replace the batteries and put the
manual/auto/off/reset-check switch in the reset-check position.
Thanks to "Doug Nowlin" <wa5ohb@xxxxxxxxxxxxx>
--
Michael R. Collins ... Michael.Collins@xxxxxxxxx
Toronto, Ontario, Canada
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