1970's Caithness Controlled Iridescent Bubble Butterfly Paperweight

Description

Caithness Controlled Bubble Iridescent Butterfly Paperweight.
I e-mailed Caithness inquiring about this piece and they said it was a second, sold in their shops, from the 1970's.
It has the deep plum colored swirls and controlled larger bubbles of the early planet paperweights with a butterfly made of tiny iridescent bubbles hovering over the plum colored base. It is marked with what appears to be acid etched block style "C||G" on the bottom. It has "frosting" along the outside bottom that comes up not quite to the middle of the paperweight.
It's in pre-owned condition with scratches on the bottom.  The top only has a few scratches, no chips, as shown in the pictures.  The tiny butterfly bubbles are iridescent and that doesn't really show well in the pictures.
This is a beautiful hard to find piece.
Appropriate measurements are 3" round and 2.5" tall.
Shipped with USPS Priority Mail.