Here's a beautiful Aquamarine threadless break knob spool that is unembossed but looks very similar to the BELCo style spools. Measures 2 1/2" wide x 2 1/8" tall. VNM shape with about 7 teeny tic marks on base and about 10 teeny pinhead size tic marks on top. Has surface stress cracks typical of insulators made in the early 1900s as they usually come off the annealing lehr this way. These are usually not considered damage. Typical light flaking around the pinhole where glass cover was broken out by lineman prior to installation. These are much harder to find than the price guide indicates.

First email gets this tough spool for only $45 plus shipping. Thanks