Watch List notes:

WORLD COMMEMORATIVE MEDALS. UNITED STATES OF AMERICA. Chicago International Exhibition, 1933, Official Bronze Medal, by Emil Robert Zettler, standing male nude with flowing loin-cloth, rev map in relief of Exhibition grounds and lake-front, 70mm; "Riggers and Riveters", Bronze Medal of the Society of Medalists, issue 30, 1944, by Mahonri Young, "High Iron" workers riding a beam, rev Riveters at work on skyscraper, 72.5mm. Both extremely fine. (2)
Emil Robert Zettler (1878-1946), sculptor and head of Industrial Art Section of Chicago's Art Institute.
Mahonri Mackintosh Young (1877-1957), sculptor and grandson of Brigham Young. This medal grew out of sketches that the artist made while watching construction from his studio window.

Estimate: £80-120