Vintage Chicago Transformer.

Model number is hard to read TF1B0IYY?

Looks new tested for continuity

Dimensions 4 1/2" x 3 1/2" x 2 1/4"  screws 2 1/4" x 2 7/8" 

Your items will be packed very well and shipped promptly.

Always glad to answer any questions.

Thanks for looking!