1934 PE coolant capacity

[TodFitch]

In that era heaters were not installed at the factory so the specification for volume was without a heater.

If you wanted a heater back then you had the choice of a number of after market accessories. Or the dealer might stock a factory authorized accessory heater and install it for you.

[Johnsymes]

The annual says 14.2 liters 3 3/4 US gallons but is it less for a PE without a heater? If yes anybody know how much.
Asking as planning to go over to Waterless coolant.
Thank you