1870 issue with a grill impression 90¢ - #144
90¢ - Carmine or dark carmine
30,000 - H grill (see below) White wove paper, thin to medium thick
p14 - Scott #144 - 1870
The H grill is 11-13 points wide by 14-16 points
No postmark with gum (MH): $2,900-$4,500
Full perfect gum, no postmark, no trace of stamp hinge mark (MNH): $28,000-$35,000
A certificate from stamp expertisers such as the PSE, would be required if interested in selling this issue.
Grills are often forged. See below for an image of a genuine H grill.
The H grill's size relative to the stamp