You are correct. According to the U.S. Treasury Department, savings stamps can be used as full or partial payment for Series EE savings bonds or redeemed for cash at face value. Local financial institutions that are issuing agents can handle the transactions. P.O. Box 27622, Richmond, VA 23261. Or you can submit the savings stamps to the Federal Reserve Bank for the value of the stamps.
Savings stamps are worth their face value.
You might be able to get a quick read on the real or fake angle by taking the fur to Deluxe Laundry and Dry Cleaners on Oak Street in Riverside. They store furs. For a serious appraisal, drop off the fur at Jacobson's fur salon. They will send it to their furrier in Orlando. There is a charge for that service.