Omega 690
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| Omega 690 |
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Description
A really rare and extremely tiny movement, which is hardly referenced in literature, is the
Omega 690, a movement in baguette shape with a size of only 7.2 x 18.6mm, which was probably used
for fashion watches. Its red-golden tone supports the great visual appealing of that masterpiece
of micromechanics.
Yes, it really ticks :-)
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| size comparison with a 10 Eurocent coin |
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The size comparison with a 10 cent coin shows, how tiny this movement, which can only be
wound from its back side, is.
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| different view angel |
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On the side view, you can easily show the baguette-type shape.
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| detail: escapement |
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The escapement of this, in two positions adjusted, movement can be seen here in detail (the
piece of dust is removed in the meantime...): The lever is not only mirror-polished, but has also
got very cleanly rounded edges. This way, it looks massive and fragile the same time.
Another speciality of the anchor is, that it's made as a lateral type, what means, that it hasn't got
the standard fork shape, but the connector to the balance is one extended arm.
The four-leg ring balance (typical for omega) is yellow-gold toned and beared by two Kif Flector
shock protections. The hairspring is fixed to the balance cock and can be adjusted in its effective
length by a prolonged regulator arm only because of the lacking space.
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| view to lower layer |
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On the two pictures below, you can see, that most of the gears, fourth and third wheel, are
below the balance assembly. Only the escapement wheel takes the complete
height of the movement, since it "connects" the escapement with the gears.
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| ... even better view into the inner works |
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On the dial side, you also can watch the gears, and if you look closely, you can spot
a part of the dial side Kif Flector shock protection between fourth and third wheel.
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| dial side view |
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The hands settings mechanism (top right on the picture) consists of a gear, whose height
is set from the backside of the movement. In the pushed (seen from the back of the movement) state,
it has no connection to any gear, but in the pulled (also seen from the back of the movement) state,
it connects to the silver-toned gear, which has got beveled teeth to "snap" in instead of takeing
damage.
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| hands setting mechanism |
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Technical data
| Manufacturer | Omega |
| Caliber | 690 |
| Number of jewels | 17 |
| Escapement | Anchor with pallets |
| Balance | Glucydur |
| Shock protection(s) | KIF Flector |
| Balance cock direction | counterclockwise |
| Hairspring stud | fixed |
| Regulator type | Hairspring key |
| Movement construction | Fork
Escapement wheel
Fourth wheel, Third wheel
Center wheel, Mainspring barrel |
| Functions | Hour, minute |
| Beats per hour | 19800 |
| Size | 31/4 x 81/4''' |
| Image in Flume Werksucher | K3 - |
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| Factsheet |
Usage gallery
