This block presumably represents the remains of a wall running north-south that belonged to the earliest ashlar building phase in this part of Area H (best attested in and around Room H-15). Presumably it met east-west wall 7377/7392 to the south, but has been truncated by later activities (probably the sondage of the Soprintendenza).

SU 7391 is covered by the ashlar block wall 7290, and thus is of an earlier construction and use phase.