Mark variant 1

I-M-S remain in order within the three-lobed perimeter, preserving the visible central lower notch.
Medium confidence comparison reconstruction.
Maker's mark comparison reference
Compare 1 source-linked mark variant recorded under Spink & Son (John Marshall Spink). These are reconstructions for comparison, not source photographs or authentication evidence.

I-M-S remain in order within the three-lobed perimeter, preserving the visible central lower notch.
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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