The Regalia is the Order consists of a Scarlet Cord (worn by all below the rank of a Grand Officer) and the jewel of the Grade of the Companion. These are shown below along with a template to show how the regalia should be worn.
There are six grades of the Order. The First Grade of the Order is conferred only upon a subscribing Prince of the Order of the Secret Monitor. The third grade is followed by the Preparation and Installation of a President.
(Reference: https://www.markmasonshall.org/orders/osc)
1st Grade Jewel
Ostiarii or Doorkeepers
3rd Grade Jewel
Fellows or Healer & Exorcists
4th Grade Jewel
Councillor
5th Grade Jewel
Keeper of the Hidden Secret
6th Grade Jewel
Prince of Jerusalem
The Ancient and Masonic Order of the Scarlet Cord in the British Isles
and its Districts and Consistories Overseas
Provincial Grand Senatus
of West Yorkshire