How many steps in a variac

For a lab bench variac that has a dial connected to a brush that
slides across the winding, does anyone know how many winding/taps
there typically are? Or another way of putting it, what is the typical
voltage step between windings? Say there are 100 windings, meaning
about 1.2 V per winding (ignoring for the moment that it might have
taps for output voltages > input voltage). Would it really go down to
1.2 volts (very first tap/winding)? I'm interested in voltage control
at low voltages.

Gene
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