is that a birds claw foot?
'Piasa bird' pg 111 Opalescent glass (4th Edition)
Although they are using Manley's Decorative Victorian Glass book as a reference and saying 'English, probably Sowerby' and we don't take him as gospel now do we.
have you got a more up to date edition?
Mel
Edited to add: ladies spittoon apparently! - nice
and looks mostly like Northwood. Happy hunting