I realized I've sort of accidentally accumulated a group of nice Canadian pieces with large bubbles and thought I'd share them.

Left to right:

1.) Hamilton Glass Co CD 162 with an enormous sealed bubble that wraps around just under half of the crown. I rarely see Hamilton CD 162s with any impurities in them so this one was a treat to find.

2.) A rounded base unembossed CD 143 with another enormous bubble in the crown.

3.) A Type 2 Diamond CD 102 in odd light green with a huge droopy bubble in the front, along with several other smaller bubbles protruding off of the pinhole.

4.) A Type 1 Diamond CD 102 in a rich light green with a huge bubble protruding off of the pinhole on one side. I found this one in a bucket of common insulators at a local fair when I was a teenager. I've always thought it was great!

5.) A double vertical bar / Diamond CD 102 with numerous sizable bubbles protruding off of the threads all throughout the pinhole. I've seen a few with this sort of pinhole deformation before.