1 Unmounted mint (UM) â the stamp is unused and appears never to have been mounted. 2  Mint never hinged (MNH) â the same as unmounted mint but with an assertion that the stamp is not a formerly mounted stamp that has been tampered with to remove traces of mounting.
vermilion zone, n the external darkish area of the upper and lower lips, extending from the junction of the lips, with the surrounding facial skin on the exterior to the labial mucosa within the oral cavity.
Consult your doctor if you experience: 1  Unusually large canker sores. 2  Recurring sores, with new ones developing before old ones heal, or frequent outbreaks. 3  Persistent sores, lasting two weeks or more.  Sores that extend into the lips themselves (vermilion 1  border) Pain that you can't control with self-care measures.