We have three of these Cs-137 Sources Manufactured by Berthold Technologies.
Berthold Model Number is 7440-D-CR.
Approximately seven years old, never put in use, originally purchased as spares (they still have manufacturers seal and lock / key).
Activity: When new 500 mCi, Estimate current activity at 410 mCi.
Note: Users must be licensed to possess them before they can be purchased.