Here's one that's tougher to track down than the guide books suggest: a rounded base unembossed Canadian CD 133. The smooth-based unembossed Canadian 133s seem to be much more abundant. This example is a typical light aqua, and retains it's original soot and wire groove crud for added character! It has some fizzy swirls in the dome above the pinhole, and a few scattered small-medium bubbles throughout.

This example has some damage in the form of a nasty, 7/8" long by 3/8" long flake on the side of the crown. Otherwise it displays well with a 1/8" tall stubby annealing crack on the base and just the normal inner base edge roughness and fine flaking.

I'm asking $40 USD plus shipping for this example. 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.