Read the stamp
Early American Pattern Glass identification
In Early American Pattern Glass identification, a mould seam explains how the piece was formed but does not by itself identify the glasshouse.
Pattern repeat and catalogue form
Compare the complete motif, border, stem and foot. A goblet and matching serving bowl can share a pattern while differing in detail. Moulded facets differ from decoration cut into a finished glass surface.
What to check next
Use the exact form and dimensions with the pattern, and retain any maker emblem or original label. A mould seam explains how the piece was formed but does not by itself identify the glasshouse.
Related marks
44 marks
Undated
Mosser Glass
Small circled M on the underside is distinct from the unbordered M above the tail.
Undated
Federal Glass Company, Columbus
IMPROVED lies inside the diamond; compare the variant with TRADE MARK in the centre.
Undated
Federal Glass Company, Columbus
This is the circular DIAMOND FRUIT JAR lid brand, not a bare diamond factory symbol; a loose replacement lid does not date its jar.
Undated
Federal Glass Company, Columbus
Added HEAT PROOF and USA identify this tableware format; a mould number does not date the mug.
Undated
Federal Glass Company, Columbus
Triangular SECURITY SEAL name and central FGCo differ from the later Shield F tableware trademark.
Undated
L. E. Smith Glass Company
Decorative hanging tag expressly naming Collector’s Carnival Glass and L. E. Smith.
Undated
L. E. Smith Glass Company
Clear rectangular label with full script L. E. Smith Glass and In the USA.
Undated
Mosser Glass
Removable clear oval label has gold company wording; distinguish it from the permanent mould marks.