
Undated
MONMOUTH POTTERY CO. / MONMOUTH, ILL. [with 12 above]
The full POTTERY CO. name separates this from later MONMOUTH ILL USA leaf stamps.
Pottery & porcelain · a closer look
Name without a leaf; this cow figure dates to about 1893–1906.
The maker field distinguishes the original company from the later retained Monmouth name.

Undated
The full POTTERY CO. name separates this from later MONMOUTH ILL USA leaf stamps.

Undated
No POTTERY CO. wording; broad leaf surrounds the shorter MONMOUTH ILL USA text.

Undated
Diagonal name and separate OVENPROOF line differ from the broad three-line impressed-leaf format.

Undated
Printed WILL NOT LEAK label appears on artware rather than the clay-impressed leaf.