Maker's mark comparison reference

Karl F. Leinonen maker's marks

Compare 1 source-linked mark variant recorded under Karl F. Leinonen. These are reconstructions for comparison, not source photographs or authentication evidence.

Source location statements
Boston, Massachusetts
Source date statements
1901 - Present

Mark variant 1

Karl F. Leinonen: KFL, KLF; line reconstruction.
Line reconstruction
Karl F. Leinonen: KFL, KLF; oxidized reconstruction.
AI-assisted oxidized reconstruction

Source-recorded mark text: KFL, KLF

Two Leinonen variants: large KLF monogram above STERLING and a smaller worn KLF monogram with lower strokes.

Low confidence comparison reconstruction.

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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