Mark variant 1

The square stamp preserves its two-by-two HG/PC arrangement and rounded-square outer boundary.
Medium confidence comparison reconstruction.
Maker's mark comparison reference
Compare 1 source-linked mark variant recorded under Gilling & Clerc (Henry Slader Gilling & Peter Clerc). These are reconstructions for comparison, not source photographs or authentication evidence.

The square stamp preserves its two-by-two HG/PC arrangement and rounded-square outer boundary.
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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