Hi Jane,
To help with the age this looks like him in 1891:
1891 census:
RG12/4162, folio 29, page 15
Durham, Boldon Colliery
36, Davison Street
William Green, h. mar. 26, Blacksmith, b. Durham, Harton
Elizabeth, wife, mar. 24, b. Durham, Seaham
Elizabeth, dau. 5, Scholar, b. Durham, Boldon
George, son, 2, b. Durham, Boldon
Mary A. dau. 7 mths, b. Durham, Boldon
Regards,
Pels