Victorian glass dish with rigaree & frit/spatter decor

My third find at the antiques fair on Sunday was this interesting Victorian glass dish.
There are many variations on this type of fancy art glass dish, & most of them would have had a silver plate holder. Often called a jam dish, bon bon dish, etc.
I have them in a number of colours & decors. Ruby & vaseline examples are probably the most often seen.
This one grabbed my attention because I have not seen this type of spatter before. It is not integrated into the body of the glass, but sits on the surface, like frit, though ever so slightly melted. Raised spatter or melted frit?
The dish is made from clear light blue glass, with the spatter/frit decor in a mix of white & pale blue. It measures around 7 cm tall, 14 cm across the crimped top rim, & 6.5 cm across the base, which has a slightly rough pontil mark. The dish has an applied clear rigaree around the middle, which has a complex pattern. Each component of the rigaree has been stamped with a waffle design. The top rim features a similar applied crest in clear glass, also with a waffle pattern. The decor is quite distinctive so perhaps someone might recognise it...