Similar to the Saf-T-Coil, a coil with a thread consisting of two deviating branches, one of which has a ball at the end. The two stalks are held together by a transparent section.

  • Inventory Number: 1839
  • Material: plastic
  • Size in cm: 3,7 x 3,3 x 0,2
  • Condition: very good
  • Donor: Univ. Prof. Dr. Robert Snowden