Prewar Lionel transformers in 1938?

Wondering if Lionel used a 1030 on those layouts, same size as the later 1041 an with built in whistle control, just not the directional button.  AD

AD here are some pics from my 1938 catalog. There is no 1041 transformer identified in there. The table states a Type “B” for the 0080W outfit. I reviewed my 39, 40 & 41 catalogs and the listed transformers were all “Letter” types, no 1041 listed. Hope these help. Make sure you post pics as you build this great sounding layout.

The type B makes sense as the W sets came with the 166x whistle/direction controller.   Thanks for the post.  If those classic catalogs were not so darn expensive, I would have every one that has OO in it, from 1938 to 1941/42 when the war shut everything down toy train wise.  AD