Not cheap, but can somebody please pick this one up, anyway? Seller listed it as 1920s. Inside the waistband is written "patented April 27, 1926", so this probably refers to the construction of the waistband and not to the date of manufacture.
The shoulders are somewhat narrow and the sleeves unusually long, supporting the 1920s date. But the suit could be early 1930s as well, don't you think?