From left to right - actual postage additional:

Large light gray (blue sky glaze) spool - Marked U in a circle // USA -- VNM -- $8.00

Large cobalt spool - Incuse marked LM in a triangle (Line Material) // 842R-- VNM -- $15.00 (SOLD)

Large mottled gray (neat color) spool - Unmarked -- VNM -- $18.00 (SOLD)

Unmarked Ohio Brass power piece in a great mottled gray glaze!! -- VNM -- $18.00

Cobalt blue Hi-top -- Incuse LOCKE / HI-TOP / 66 -- VNM -- $10.00