Argonaut shell w/ seaweed & shells, vintage ocean blue opalescent glass bowl

Argonaut seashell pattern blue opalescent glass bowl, shell shape with seaweed and tiny scallop shells. This measures about 3 3/4" tall, 7 3/4" x 6 1/2" over the bowl.

There's a dark smudge (about the size of a fingerprint) INSIDE the glass, can't be touched from inside or outside the bowl. We think it must be left by the hand shaping process to make the bowl. Aside from that, this looks very nice, no chips or damage.