The Youngstown Sheet and Tube Co.

The Youngstown Sheet and Tube Co. ad from the November 1941 issue of Heating Piping and Air Conditioning.

The Youngstown Sheet and Tube Co.

 

Spang Chalfant Inc.

Spang Chalfant Inc. ad from the November 1941 issue of Heating Piping and Air Conditioning.

Spang Chalfant, Inc.

 

Fitzgibbons Boiler Co. Inc.

Fitzgibbons Boiler Co. Inc. ad from the November 1941 issue of Heating Piping and Air Conditioning.

Fitzgibbons Boiler Co., Inc.

 

Allis-Chalmers

Allis-Chalmers ad from the December 1941 issue of Heating Piping and Air Conditioning.

Allis-Chalmers

 

Republic Steel Corp.

Republic Steel Corp. ad from the December 1941 issue of Heating Piping and Air Conditioning.

Republic Steel Corp.

 

Torrington Mfg. Co.

Torrington Mfg. Co. ad from the December 1941 issue of Heating Piping and Air Conditioning.

Torrington Mfg., Co.