Parke-Bernet sale No. 1069 #628, Brummer Collection, May 11–14, 1949.

From the catalog (some text omitted because is was sold with a Swiss scabello):
CARVED WALNUT SGABELLO    Italian, XVI Century
... carved with strapwork dolphins and armorial escutcheons....

More information:
Excellent condition. Almost identical to scabelli sold from the Davanzati Palace collection in 1918 and from the Bardini collection in 2016.