Due to their limited issuance and historical significance, 1950 C US $10 bills with green seals are highly sought after by collectors. The value of these notes can vary depending on their condition and rarity. A well-preserved 1950 C US $10 bill with a green seal can be worth several hundred dollars or even more. The exact value can be determined by factors such as the overall condition of the note, any tears or folds, the clarity of the printing, and the presence of any unique markings or signatures.
If you have a 1950 C US $10 bill with a green seal, it is recommended that you have it evaluated by a professional numismatist or coin dealer to determine its exact value.