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International media Interoperability Framework
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more.
- Hemmi Simplex Slide Rule (Post Model 1447), Front View with B/C/IC Scales.
- SLIDE RULE - FREDERICK POST CO. 1447 (HEMMI)
- Hemmi Simplex Slide Rule (Post Model 1447), Front View with S/L/T Scales.