Instructions
Determine if the color of your glassware is one that was produced by Anchor Hocking. The most common colors were ruby red, forest green and clear crystal. Some pieces can also be found in white milk glass, amber or pink.
Look at the flower pattern on your glassware. The flowers on Anchor Hocking Sandwich glassware have double lines around the flowers. The other companies produced Sandwich glass with simpler flowers with single lines.
Examine the scroll pattern on your piece of glassware. Anchor Hocking Sandwich glass has a "V" shape at the center of its scroll pattern. Comparatively, if your piece has a scroll pattern that is more "M" shaped, it could be a piece by Indiana Glass Company.
Verify the authenticity of your piece of glassware with an antique dealer. Even if you feel fairly confident that yours is a piece of Anchor Hocking Sandwich glass, an expert will be able to confirm this for you.