Mark variant 1
Source-recorded mark text: IC
The clearer IC impression is reconstructed as two upright serif letters.
Low confidence comparison reconstruction.
Maker's mark comparison reference
John Coburn maker's marks
Compare 1 source-linked mark variant recorded under John Coburn. These are reconstructions for comparison, not source photographs or authentication evidence.
- Source location statements
- Boston, MA
- Source date statements
- (b.1725 - d.1803)
Market evidence for John Coburn
0.68–0.81× melt — the middle half of observed sold-price-to-silver-value ratios, from 11 weighable lots across 10 auction houses. Each lot uses the silver reference at its sale date.
This maker-level evidence does not value your object. Matching a mark cannot establish authenticity, material, condition or provenance.
Sources and comparison limits
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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