The Unknown Quantity
- Жыл: 1919
- Өлкө: United States of America
- Жанр: Drama
- Студия: Vitagraph Company of America
- Ачкыч сөз: lost film
- Директор: Thomas R. Mills
- Кастинг: Corinne Griffith, Huntley Gordon, Harry Davenport, Jack McLean, Jack Ridgeway, F.R. Buckley
