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- The Duplex is a frictional escapement like
- the cylinder and the virgule or rather it
- is a frictional-rest, but there is also
- recoil. The escapement consists of a wheel
- with two sets of teeth, one set being
- horizontal and the other vertical.
-
- Lubricating - The ruby roller of a duplex
- must, however, be very lightly oiled
- because the locking tooth is always resting
- on this roller. Only a very small amount
- should be put in the V-slot.