Selected unworked slab of calculated lower density, free fro

Selected unworked slab of calculated lower density, free from infections, stage in the manufacture of 'Kryptok' bi-focal spectacle lenses.

Collection
Science Museum
Inventory Number
3160262
Title
Selected unworked slab of calculated lower density, free fro
Object Type
PhysicalObject
Measurements
- overall: 50 x 50 mm

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