brass washing tub made by voss manuf. out of davenport iowa–a floto plane.
Voss Washing Machines, made in Iowa were sold back in 1932, for $59.00 up to $150.00, depending on what state you purchased it in. Voss was the 1st to offer a washer with a corrugated porcelain enameled tub.
http://graphic-design.tjs-labs.com/show-picture?id=1228010152
This website contains info about Voss Washers, but I was unable to find a "Brass" Voss Washer. Most all are copper/wood/porcelin. Without an accurate description or picture of your Voss Washer, I cannot give an accurate amount of what it may be worth.
It was for sure "Priceless" to any woman back in the day who could afford such a luxury!
I’m sorry I could not be of more help…