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Relay-Ricoh Scientific Instruments Co. "Relay" No. 105

• Type: Closed Body Rietz
• Size: 10 Inches
• Material: Bamboo and celluloid
• Scales:
  • Front: K A [ B CI C ] D L
  • Back: [ S ST T ]
• HvH: 2255

Inch and centimeter scales on body. decimal fractions of inch to 1/16 and foot to 1/4 inch; unit conversions; materials properties. ST scale labelled "S&T". Brown sewn leather case.

Includes the inevitable celluloid strip with physical properties and unit conversions.

Gift of Weldon Teetz.