Lewis and Clark Centennial Exposition Commemorative Medal

This is a circular commemorative medal or token featuring imagery and text related to the 1905 Lewis and Clark Centennial Exposition held in Portland, Oregon. The physical characteristics include a metallic composition, likely a copper alloy, brass, or bronze given the yellowish-gold base tone and heavy natural tarnish, toning, and dark oxidation spots across the surface. The obverse side shown in the photograph displays a raised, relief-cast central scene depicting two figures, presumably Meriwether Lewis and William Clark, accompanied by a Native American guide beneath sunburst rays. The surrounding text reads 'LEWIS & CLARK CENTENNIAL EXPOSITION' arched across the top edge and 'PORTLAND 1905 OREGON' along the bottom edge, separated by small circular dot stops. The item exhibits significant surface wear, discoloration, and patina consistent with age and exposure to the elements over more than a century. There are no visible maker's marks or hallmarks on this side of the medal. The attribution and identification are based entirely on the clearly legible molded text and commemorative imagery directly visible on the piece. The style is typical of early 20th-century American exposition souvenirs and commemorative medals, reflecting the popular medallic art of the period.

Based on the provided image, I have examined this circular commemorative medal bearing text related to the 1905 Lewis and Clark Centennial Exposition in Portland, Oregon. From the photograph, the piece appears to be made of a copper alloy, brass, or bronze, exhibiting significant surface wear, dark oxidation spots, and heavy tarnish. I can see a relief-cast central scene of figures and a Native American guide beneath sunburst rays. However, I cannot evaluate the reverse side, nor can I test the metal composition or weight from a photo. The attribution to the 1905 exposition is based on the molded text. Assuming this piece is an era-appropriate souvenir from the event, similar medals in heavily circulated and tarnished condition typically sell in the $25 to $50 range. The market for early 20th-century American exposition souvenirs maintains steady but modest interest. Condition is a major factor for medallic art collectors; the heavy wear and tarnish on this piece significantly limit its potential value compared to examples in pristine state. If this item were found to be a modern reproduction or fantasy piece rather than a period souvenir, its value would likely drop to a nominal $5 to $10 as a decorative novelty. To firmly establish its origin and era of manufacture, an in-person physical inspection by a numismatic specialist would be necessary to evaluate the die characteristics, exact weight, and metallic composition.