Mach -
The DC3s here were mostly converted C47s. The Aussie ones all had electric-only starters. Some Pommy and Canadian aircraft still had the wartime inertia crank starters fitted as a back-up.
There is one regularly used ex RAAF DC3 in Melbourne that has inertia starters as the only electric starting system. Maybe that is what you meant. It also has the ability to be hand cranked to energise the inertia starter system in the event of a depleted battery.
Blackburn