On the left is a wide spool LRI embossed on the skirt: No 2. These are uncommon, and normally found in shades of light aqua. Often these have bubbles, or milk, or are just crude. On the right is an LRI embossed on the skirt: No 3. These are also normally found in shades of light aqua. Two whole units were located some years ago in cobalt blue. These were sold to eager buyers on eBay. The No 2 spool is just over 2 inches wide at the base, and is 1 5/8" tall. I do not know which company used these two styles in their installations. I've turned the embossings to the right to show them better.