The seals are numbered 1-7 from top left to bottom right.
Seal 1: Mound A-B
Sahni writes:
"The seventh stratum will probably be found to be occupied by a building of considerable magnitude though so far only a portion of its floor has been exposed.
[Original 1931 text] This animal is on fifteen of the seals, Nos. 362-76. In fact, it may be said to rank next in order of popularity to the bull. On most of the seals it is carefully portrayed, in some cases even to the wrinkles along its back.
A collection of inscribed objects found along the main street leading to the southern gateway of Mound E at Harappa. The fragmentary seal on the left is the earliest seal found to date, and depicts a bovine carved in a very archaic style.
[Original 1931 text] We have certain proof in Nos 327-40 and Possibly No. 542, that this type of bull was known in India in very early times. The characteristic hump on the shoulders allows of no doubt whatsoever.
Compare the square seal on right with this button seal found at Harappa. These and the stone seals shown earlier are often called "compartmented" seals, with the backs being either open or closed.
Sandro Salvatori in Bactria and Margiana Seals: A
Long rectangular seals and a terra cotta sealing (bottom) with Indus script. The top seal has seven signs of Indus script. The back of this seal is convex and it is perforated from the side.