2 Mun Jeon; Space

The "Space" designation refers to a blank field intentionally left on the reverse where other varieties in this series carry a secondary mint or furnace identifier. Whether this reflects a specific foundry's practice or a die state peculiarity remains debated among specialists in Korean cash coinage. Joseon minting authority during the 1740s was distributed across multiple government bureaus and military offices, each producing recognizably distinct varieties — the absence of a mark here is itself diagnostic, not accidental.