Pair Victorian green cased art glass thorn vases

Thorn vases...a firm favourite of mine, & a classic of Victorian art glass.
This pair was a super buy it now on eBay AU - as soon as I saw them, I didn't have to think twice about snapping them up.
Made from two layers of cased glass - a brilliant emerald green over a white interior, the vases measure around 20 cm tall, with double tubes that sit upon green footed bases.
Possibly Bohemian origin.
I have quite a few thorn vases, & have admired many others, but haven't seen a pair in quite this same shade of green.
What is also interesting about these is that they can be used to create alphabet letters - two "Vs" or "Us", a "W", an "M", or even two lower case "Ns". Possibly others as well...but of course the "M" is my choice!