Not sure who made these. They pop up around my area from time to time. Washington Water Power used them on house drops on those groovy cast iron "J" pins. This one is close to perfect condition, with just a 1/2" rough spot/flake under the upper wire ridge. Heavy, drippy indigo blue glaze pools nicely in spots, contrasting with the lighter, more grey areas. Some pinholes in the dome filled with glaze have a bright, cobalt color. $32 + postage.