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Frederick Post Co. No. 1447

• Type: Closed Body Enhanced Mannheim
• Size: 10 Inches
• Material: Bamboo and celluloid.
• Scales:
  • Front: A [ B CI C ] D K
  • Back: [ S L T ]
• HvH: 2211

Enhanced Mannheim style rule, made by Hemmi. A thin strip of celluloid on the reverse includes physical properties and conversions. The 1447 adds onto the 1446 with CI and K scales.

The marking "Made in Occupied Japan" implies a date of manufacture between 1946 and 1950. With paperboard box.