« Reply #5 on: Friday 27 November 15 11:46 GMT (UK) »
Have you seen the wiki page? While you say your G-Grandfather was given the book as a boy wiki says they took over in 1845 ( Queen Vic) and their sons carried on under Edward VII.
There is also an Eyre and Spottiswoode Bible on a popular auction site suggesting it was 1839. Maybe have a look see and see which matches yours.

Genealogy-Its a family thing
Paternal: Gibbins,McNamara, Jenkins, Schumann, Inwood, Sheehan, Quinlan, Tierney, Cole
Maternal: Munn, Simpson , Brighton, Clayfield, Westmacott, Corbell, Hatherell, Blacksell/Blackstone, Boothey , Muirhead
Son: Bull, Kneebone, Lehmann, Cronin, Fowler, Yates, Biglands, Rix, Carpenter, Pethick, Carrick, Male, London, Jacka, Tilbrook, Scott, Hampshire, Buckley
Brickwalls- Schumann, Simpson,Westmacott/Wennicot
Scott, Cronin
Gedmatch Kit : T812072