Certificate of Provenance & Condition
Authenticated by LensSeed
Contax / Yashica
Yashinon-DS
Authenticated
Condition assessment
BWeighted across
three axes
three axes
Optical4/5
Mechanical4/5
Cosmetic4/5
Certificate №LS-28755713072F
Serial57073323
MountM42
Focal length50mm
Max aperturef/1.7
Issued22 June 2026
Honest defect disclosure
DustMinimal
HazeNone
FungusNone
SeparationNone
Coating marksNone
Oil on bladesNone
Scan to verifyLS-28755713072Flensseed.com/cert
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