Recent flea market find. Western electric telephone model 357?

Copper casing mounted on tripod stand. Marked "property of Bell Systems Not forr sale" on 4 prong power plug. Model Number on inside of the handset reads 357. Telephone number featured on rotary dial is area code 616 DAvis 7-2261. Rotary dial is hidden under flip down door on the upper half of the case. Recently purchased at a flea market in Michigan. I would love any history or information available on this item.