Here's a tougher-to-find marking that surfaces from time to time here in Ontario. On its base, this one is recessed-embossed: HP / STROMBERG-CARLSON. It also has an odd sort of two-toned glaze, with one side noticeably more bright white than the other, and a line dividing this fairly obvious sharp contrast running vertically up one side.

This example is VNM with just a light bit of rust staining on one side.

I'm asking $10 USD plus shipping for this piece. I'm always happy to trade for early Canadian glass or Canadian-made porcelain insulators. I accept PayPal, or personal cheque from any member of ICON or any collector with whom I have dealt before. Please feel free to contact me with any questions or for more photos, and look through my other items or unsold sales stock to combine shipping on items.