Here's a CD 155 that came from Colombia that not only has zero manufacturer markings (no dots or manufacturer/user name) but has a wildly squished skirt on one side that also warped the inner skirt into an egg shape! This insulator is likely one of the last glass insulators made in the country. I've only seen one other example CD 155 like this one with zero embossing and no dots and warped skirt/pinhole! Likely made at the same time were the unembossed CD 203's in this color.

These were originally made for Telecom, the nation's telephone company that was bought out and changed hands at least twice. This explains the removal of the name from the skirt. The company Coovinal originally made these in Villavicencio but they encountered legal problems so they may not be in business any longer. (I've seen their company catalog featuring several style glass insulators for telephone line use).

2 Tiny match head flakes, small scuff mark and a few tiny tic marks. Easy VNM. First email gets it for only $55 plus 11 shipping. Thanks