My son came home with several off these unmarked insulators from southern Ontario. I could not find any info on this one. At the recent London Ontario swap no one had seen these ones either. It did resemble Ohio Brass. The skirts measurements are as follows. 11IN, 8&1/8IN, 7&1/4IN, and 3&3/8IN. The height is 8IN. Has anyone seen tis one before? Thanks Brian Yanchuk