Mark variant 1

A single horizontal rectangular punch is retained with the same left-to-right sequence, separator dots, hyphen, and outlined letter silhouettes.
Medium confidence comparison reconstruction.
Maker's mark comparison reference
Compare 1 source-linked mark variant recorded under J M-A. These are reconstructions for comparison, not source photographs or authentication evidence.

A single horizontal rectangular punch is retained with the same left-to-right sequence, separator dots, hyphen, and outlined letter silhouettes.
Medium confidence comparison reconstruction.
Maker labels and date or location statements follow the cited source records. Similar names across source collections have not been merged. Compare the photographed mark and the complete object before relying on a resemblance.
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