Mark variant 1

Three rows of paired initials are retained in the visible top-to-bottom, left-to-right order inside the square cartouche.
Medium confidence comparison reconstruction.
Maker's mark comparison reference
Compare 1 source-linked mark variant recorded under Thomas Phipps & Edward Robinson. These are reconstructions for comparison, not source photographs or authentication evidence.

Three rows of paired initials are retained in the visible top-to-bottom, left-to-right order inside the square cartouche.
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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