Here's a cool Spanish unlisted unipart porcelain insulator that was made by Manufacturas Ceramicas (MC) circa 1915. Incuse embossed with MC logo and 2908 221 3051. (I think these numbers refer to the ISO specification and catalog number). Looks like a baby multipart! 2.5" W x 3.75"T. Mint condition except for a teeny tie wire rub mark!

First email gets this cool unlisted (not in any of the books or NIA website) Spanish insulator for only $55 plus $8 postage. Thanks!