Blue Crackle Cream and Sugar - Blown Glass

Hello everyone! I'm trying to find out anything I can about this cream and sugar set. The creamer is 3 1/4" high and the sugar is 3 1/2". The way the crackle is done it looks almost paneled. I've been through my crackle glass books and on the web but haven't turned up much. The few sets I've found don't have the sloping tops that these do. Does anyone recognize them? Thanks for whatever help you can provide.
Don