Hi Folks.....
Here's one you won't see very often.
Issued in 1872.....No face value, intended use was to seal large envelopes that contained registered mail or stamp requisitions shipped to post masters.
Quite large 2 7/8" x 1 5/8"

USED......on white wove paper $7.50
USED......on Pelure paper $40.00
MINT......on laid paper $500.00....no value given for used.