The discontinuance of distinctive parcel-post stamps made it necessary to issue five new denominations of ordinary stamps to take their place. The new stamps are of the same shape (a rectangle on end) and size (about 7/8 by 23/32 inch ) as the other ordinary stamps, series of 1912, and are described as follows:
The 7-cent stamp bears the head of Washington in profile, from Houdon’s bust, looking to the left. The border design is the same as that of the first six denominations of the current series.
The 9-cent, 12-cent, 20-cent, and 30-cent stamps bear the head of Franklin in profile,
from Houdon’s bust, looking to the left. These four denominations have the same border design as the current 8-cent to $1 stamps.
In addition to its use on parcels, the new 12-cent stamp was convenient for prepayment of registration or special delivery fee with a single rate of letter postage.
Published by John Jr. Paperly
Source: Postage Stamps of the United States 1847-1959