Here's an unlisted unipart porcelain insulator made by unknown manufacturer (marked H u M) inside a sideways diamond) and 1929 possibly exported to Spain. Marking looks similar to AH in a diamond by Adolfo Hielscher in Germany. Measures 4" base width x 3" tall. Has fingernail chip and a pair of circular cracks on reverse upper wire groove. Base and both skirts are VNM+. Some stains.

First email gets this early unlisted porcelain insulator for only $25 plus shipping. Thanks