Victorian cased rainbow spatter glass vase

This was a birthday present to myself (the big day was yesterday).
I'd been watching this vase on eBay UK for a while, & it had come down in price a few times, then I decided to make an offer, which was quickly accepted.
It is made from three layers of cased glass, clear over a softly blended spatter of pink, blue, orange & yellow, with a white interior. The vase measures 15.5 cm tall, 6 cm across the top rim, & 5.5 cm across the base. The simple, yet distinctive form consists of a rounded, four sided body topped by a short, flared cylinder with a scalloped rim. The spatter has an interesting, almost watercolour - style, painterly effect, like feathery brushstokes.
No pontil mark is visible on the base.
This was sold as Harrach. I guess circa 1880s - 1890s or so.
In perfect condition.