
Undated
MARTZ
The source dates the illustrated example to 1948-1989; this is observed-object evidence, not a mark-use interval.
Pottery & porcelain · a closer look
The source dates the illustrated example to 1948-1989; this is observed-object evidence, not a mark-use interval.

Undated
The source dates the illustrated example to 1948-1989; this is observed-object evidence, not a mark-use interval.



Undated
The source dates the illustrated example to 1953; this is observed-object evidence, not a mark-use interval.

Undated
The source dates the illustrated example to 1948-1989; this is observed-object evidence, not a mark-use interval.

Undated
The source dates the illustrated example to 1953; this is observed-object evidence, not a mark-use interval.