This is a CD 164 (005) B in very close to mint condition. Only flaw I see is a open bubble on the base that you can see below the B to the right side. This is one you won't have to upgrade. Most of these come in just plain old aqua. This one has amber streaks running throughout giving it a yellow green appearance. It is the best I've seen! It also has a nice bubble in the front top wire groove area. You will like this one! Price is $25 and I will cover shipping costs. Sorry, this insulator has found a new home!