obviously some kite flying from that seller - Victoria celebrated two Jubilees, so I suppose we might take our pick since no suggestion of which one was being indicated - although neither of them (1887 and 1897) agrees with the lozenge date of 1865.. The seller appears not to have deciphered the details of the diamond.
Lustrousstone will know far better than me, but I'd suggest this pale minty green is uncommon, and might on its own have suggested a specific source - I've just ploughed through two volumes of Barrie Skelcher's uranium glass and this shade of green does seem scarce. Might this be a type of green more akin to c. 1900? - it's obviously nothing like those lurid lemony crowns that probably are earlier.
Have just realized that nowhere in the original thread (where the Edwardes crown was referred to) or in this one, was there any reference to Barrie Skelcher's volumes.
This author does show one of the lemony coloured uranium examples - again missing its top cross - and apparently bought it in Oz from a dealer who said he'd acquired it in Jamaica 'where he used to live'

- so a very well traveled crown.
Skelcher comments ... "Oddly the design is registered under glass, but this mark is for metal!"
I'm not entirely sure what he means by this........perhaps he'd checked both the Register and Representations books and found this entry in both.
Like most of us, Barrie Skelcher suggests this was made to commemorate some Royal event, but says "but I have not been able to identify any of that date".
Heartwarming perhaps for those who have bought one cheaply ........... Skelcher adds..."Value, if undamaged, $110 - $145