[Dave Moll]

If the dial needs to be open when at rest, could you use the dial-off-normal (DON) contacts in series with the dialing contacts. These are open when the dial is at rest and closed when the dial is moved from its rest position. One pair of DON contacts usually shares a terminal with one side of the dialling contacts. You may, however, get one more "connect" than the number you dial, as the first will be as you turn the dial, followed by one after each disconnect as the dial pulses.

As telephones used loop disconnect to pulse the steppers at the exchange, I'm not aware of any that work the other way round.