½¢ Sheet Stamp - Most On Cover
Currently, the largest known number of the ½¢ sheet stamp on cover, parcel piece, or tag is: 32.
Description: Air mail special delivery cover to Germany containing 32 copies on the front plus a single 5 cent Prexie paying the 6 cent air mail rate and 15 cent special delivery fee.
Owner/Source: Image taken from The Prexies (page 89) by Roland Rustad.
Currently, the second largest known number of the ½¢ sheet stamp on cover, parcel piece, or tag is: 30.
Description: Airmail cover to Germany containing 30 copies on the front.
Owner/Source: Richard Pederson
Covers with 12 of the ½¢ paying either double the first class rate or the air mail rate are relatively common, but none have been reported with over 12 except the two above.