Prices for American 30,5cm guns differed quite according to the Dutch magazine Marineblad dated 1910-1911 no. 11

An item reported that the estimated manufacturing costs for the 30,5cm L/50 guns were by the Naval gun foundry at Washington, USA 63.699 US dollars and by the Bethlehem Steel Company and the Midvale Steel Company 72.800 US dollars.