Is One Of These Lionel Transformers 100 Years Old? Dating Lionel Prewar Type A, B and N Transformers

I found these three Lionel Prewar transformers in a "junk box". Let's look at the features, details, and possible production dates of these Lionel Prewar Transformers: Type A, Type B, and Type N.

Do you have more detailed information about these? Please comment below.