Timberhill Gallery has dated this piece to the Edwardian era.
The piece is fully inscribed to the back:

Published Feb 1863
Copeland
Chrystal Palace Art Union
F M Miller Sculptor
The bust sits on its original Chrystal Palace Art Union stand and is in very good condition, no chips or cracks.
This is a rare piece of Victorian Royal memorabilia and rare to find a piece in such excellent condition.
32cm tall
Timberhill Gallery has dated this piece to the Edwardian era.
You can view the stock and full dealer information on the Timberhill Gallery Profile Page