An EP-87 "Weitschirm" style porcelain insulator which I recently "won" on E-bay. What is the manucacturer and country of origin, and does this have an official U or M number? Dimensions are approx 8 cm (3 1/8 inches) across, 6 cm (2 3/8 inches) high. It is possibly from Eastern Europe.

Another similar (if not identical) insulator is shown here: [id=184397092]