This 1866 Promissory Note Bundle features the R33C 10C Blue 'Certificate' and the R27C 5C Red 'Inland Exchange' notes, both integral to the First Issue Revenue Stamps of the United States. These notes were issued between 1862 and 1863, during a transformative period in American history. **R33C 10C Blue 'Certificate'** - **Denomination:** 10 cents - **Color:** Blue - **Scott Catalog Number:** R33C - **Year of Issue:** 1862 - **Condition:** Used, Fine-Very Fine - **Catalog Value:** Approximately $0.40 ([jaysmith.com](https://www.jaysmith.com/Specials/United-States/United-States-Stamps-Revenue-Stamps-Page-2.html?utm_source=openai)) **R27C 5C Red 'Inland Exchange'** - **Denomination:** 5 cents - **Color:** Red - **Scott Catalog Number:** R27C - **Year of Issue:** 1862 - **Condition:** Used, Fine - **Catalog Value:** Approximately $0.30 ([jaysmith.com](https://www.jaysmith.com/Specials/United-States/United-States-Stamps-Revenue-Stamps-Page-2.html?utm_source=openai)) Both notes are ungraded and unconfirmed, reflecting their authentic, used condition. Their historical significance and unique design make them a valuable addition to any collection. Each note will be securely shipped to ensure it arrives in pristine condition, ready to enhance your collection.