Nice Stamps/Covers - See Scans for Details & Condition. See Our Store for Many More Stamps. The item "$US Sc#R100d used/F-VF+, silk paper sound stamp! $300" is in sale since Thursday, May 10, 2018.This item is in the category "Stamps\United States\Back of Book\Revenues". The seller is "suncoaststamp" and is located in Sarasota, Florida. This item can be shipped worldwide.