Here are three nice porcelain insulators in great glaze colors -- actual postage additional:

U-30 unmarked but attributed to Lima -- fantastic glaze! Just a couple of small base flakes that appear factory -- $25

Very cool spool with an awesome mottled green glaze -- recess embossed U.S.A. on the end -- no issues -- $40

Early johnny ball strain -- unmarked but original collector marked in tiny letters on the firing rest "L. NAPA, CA 720930" -- does have some chipping around the wire grooves that is typical for these -- fantastic light tan glaze!! -- $20

Take the set of three for $75