Button Sign Appraisal

Get AI-powered appraisals for your Button Sign. Upload a photo for instant valuation.

60 second results

Free To Use

Leading AI

Vintage Sinclair Opaline Motor Oil Porcelain Button Sign

This is a circular, convex 'button' style advertising sign for Sinclair Opaline Motor Oil. The sign features the iconic Sinclair branding, characterized by a vibrant color palette of hunter green, crimson red, and off-white. The central graphic depicts the famous Sinclair Apatosaurus (commonly referred to as a Brontosaurus) in white with green outlines, set against a red circular field. Text elements include 'SINCLAIR' in a custom stylized green font, 'OPALINE MOTOR OIL' in bold white block lettering, and the slogan 'MELLOWED 80 MILLION YEARS' at the bottom edge. Physically, the piece appears to be made of heavy-gauge steel finished with a porcelain enamel coating. It measures approximately 12 to 15 inches in diameter based on visual scale. The condition shows significant signs of age and display; there is a dense network of surface crazing and fine hairline cracks, particularly across the white border and the dinosaur graphic. Noticeable 'flea bites' or small enamel chips are present along the outermost rim, which is typical for authentic porcelain signs of this era. The color saturation remains strong, though there is a slight yellowing or patina to the white sections. This style of signage was predominantly produced during the 1930s to 1950s, representing a peak era for American petroleana and roadside advertising. The lack of a visible maker's mark in the photograph suggests it may be located on the reverse or obscured by the mounting hardware.

Estimated Value

$400 - $600

Example of a recent Button Sign appraisal

Instant Results

Under 60 seconds

Free To Use

Free Appraisals

Leading AI

Advanced algorithms

Detailed Reports

Comprehensive analysis

How Our AI Button Sign Appraisal Works

Upload Your Photo

Take a clear photo of your Button Sign and upload it to our platform. One photo is all you need.

AI Analysis

Our advanced AI technology analyzes your item.

Receive Valuation

Get a detailed appraisal report with estimated value range, market insights, and item details.

View our AI appraisal disclaimer

Getting the Best Appraisal

Use good lighting to capture all details
Place item on a neutral background
Include any identifying marks or labels
Ensure the entire item is visible in frame

Powered by Advanced AI Technology

We use cutting-edge AI to provide valuation estimates. For official appraisals, insurance, or sale purposes, we recommend consulting with certified appraisers for insurance or sale purposes.

60s

Fast Results

Free

No Cost

24/7

Always Available