The very earliest OM-1's used 6mm long screws for the mount, but these were
replaced with 4.5mm screws. If your body had the shorter screws, it is
sometimes possible to replace the ones that have broken out with 6mm ones.
Or course it is possible, even likely, that the distance from the mount to
the film (or body focus) is off due the deformation of the casting -- a good
shop can check for proper alignment, or you can shoot some precise test
rolls.
There are actually several different casting styles in the OM-1 and OM-1n,
and I would hesitate to even try "mingling" parts without very careful
comparison, body to body.
>
> Could the Front Casting Part (that's the body part that holds the lens
mount and the mirror etc.) of an OM-1n be
> replaced by that of an OM-1? The 1's part number is CA8702; and I haven't
got the exploded view or a parts list
> for the 1n.
>
> The background of my question: I have an OM-1n, and the top screw that
holds the Bayonet Mount (OM-1
> equivalent of CA8877) to the body has lost its grip. It turns out that the
side of the socket it is screwed into has
> broken off. This socket is an integral part of the die-cast front of the
body.
> One way of repairing the camera would be to swap my 1n's Front Casting
assembly with the assembly of an
> other camera (or if the assembly doesn't fit, only swap the Front Casting
Part).
> I happen to have a regular 1 with a broken light meter that could provide
donor parts, so I'm considering a
> transplant of the 1's Front Casting Part into the 1n. I wouldn't mind
having a go with the repair, but I would like to
> have a slight understanding if there are any chances on success.
>
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