The Santa Fe only had 10 in service before the war, the Ga-45 class built in 1936 by AC&F.
Date: Wed, 14 Oct 2015 18:20:55 -0500
Subject: Re: [STMFC] Depression era / pre-WWII Covered Hoppers?
The M&StL (west of the Mississippi) purchased 10 covered hoppers in 1940. They were used for cement service. Next order for covered hoppers was placed in 1947 for 50 cars.