Mark
Welcome to the board!
Looks like a Hobbs shape to me, too. Although collectors have long used the term Barber Bottle for this type of bottle, in the old Hobbs catalogs they are called a Bitter which implies bar use. If cranberry opalescent examples are known, then the existance of blue and crystal opalescent should also be anticipated and you have proved that out. Regardless of the colour, this is a great find as these are desirable pieces.
Sid