here is a set of set of six light blue or light blue-gray signals -- $25 postpaid in the US!!

1) No markings - nice mottling - base flake

2) no markings, suspect unmarked Thomas, base flake

3) Nice drippy glaze skirt rest Pittsburg style - VNM

4) Heavy signal, deeper blue color, no markings -- VNM

5) Ohio Brass marked, radio treated pin hole - VNM

6) Awesome blue speckled Pittsburg glaze, flat chip up skirt at base