Graphite drawing depicting Mount Rushmore signed 'Cali Dexter'

This is a monochrome graphite pencil drawing on heavyweight off-white paper depicting the famous Mount Rushmore monument, featuring the carved faces of U.S. Presidents George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln. The artwork showcases detailed shading, cross-hatching, and fine pencil strokes to capture the texture of the carved stone faces and the surrounding rugged mountain terrain. The lighting appears to come from the upper left, casting gentle shadows across the facial features and the rock formations. In the lower right corner, there is a visible handwritten signature that appears to read 'Cali Dexter' along with a date that looks like '8/1986'. The paper appears to be in overall good visual condition with clean borders, though there is a slight natural curve or warp visible as it is held loosely. The composition is horizontally oriented, centered on a larger rectangular sheet of artist paper. The attribution in the item name rests directly upon the legible signature located in the lower right corner, though the artist identity and exact age remain unverified and this is not an authenticated piece. The style is illustrative and realistic, displaying competent draftsmanship and careful attention to tonal gradation.

Based on what I can see in the photograph, this is a monochrome graphite pencil drawing on heavyweight off-white paper depicting Mount Rushmore, bearing a handwritten signature in the lower right corner that appears to read 'Cali Dexter' and is dated '8/1986'. The drawing displays competent draftsmanship, careful tonal gradation, and detailed shading to capture the texture of the carved stone faces. However, I cannot verify from a photo alone whether the signature represents the actual hand of the named artist, nor can I evaluate the precise paper quality or potential hidden condition issues without physical inspection. Assuming the attribution to the signed hand is correct, works of this type and medium by regional or lesser-known contemporary draftsmen typically command a modest collector interest in the secondary market. General demand for original graphite drawings of iconic American landmarks remains steady yet niche, largely driven by decorative appeal rather than high-tier fine art investment. To properly assess or elevate the status of this piece, an in-person examination by a qualified paper conservator or fine art appraiser would be needed, alongside research into the possible identity of the artist. If further investigation reveals this to be a reproduction, a copy by an amateur, or a work merely in the style of rather than an autograph piece, the market value would drop significantly, likely falling into the $20-$50 decorative bracket. This estimate assumes the conditional integrity observed visually, but any framing acidification, foxing, or fading upon physical review would negatively impact the valuation.