From left to right -- actual postage additional:

U-387 crisp incuse mark VICTOR R=oo in an insulator, great speckled red-brown glaze, VNM+ -- $20 (SOLD)

U-388 incuse THOMAS in white, VNM+ -- $15 (SOLD)

U-377 Unmarked in a great Pittsburg glaze, crude and VNM+ neat piece! -- $15 (SOLD)

U-379 incuse VICTOR, nice dark tan speckled glaze, flat skirt chip (see photo) -- $15

Unusual dry process colored pony with a tan and green spekled glaze -- odd beast, VNM -- $12 (SOLD)

Not sure of the U number on this one!! maybe similar to a U-108 -- odd and great glaze! -- $15 (SOLD)