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
with Jane Martz Gordon Martz mark: Martz
Other with Jane Martz Gordon Martz marks
Undated
G. Martz 1957
The source dates the illustrated example to 1948-1989; this is observed-object evidence, not a mark-use interval.
Undated
Martz 1953
The source dates the illustrated example to 1953; this is observed-object evidence, not a mark-use interval.
Undated
GM
The source dates the illustrated example to 1948-1989; this is observed-object evidence, not a mark-use interval.
Undated
Martz 1953
The source dates the illustrated example to 1953; this is observed-object evidence, not a mark-use interval.