The GER always allowed contractors a certain amount of freedom within their specified design, and three early types evolved built by Saxby & Farmer, Stevens or McKenzie & Holland.
By 1877 the GER were consolidating their own design, which featured a gabled roof, with large overhang, and weatherboarding.
Windows were always two panes high in this design.
A more ornate style of construction replaced this type in 1882, but this did not last long - the GER was never a rich railway.
By 1883 brick boxes were being built to a plainer design, although 1884 saw some ornateness returning.
For instance, March West box contained mock stonework in the gables, fancy window design and decorated bargeboards.

By 1886 timber boxes were being constructed again as well as brick examples but this - with some variation - was the last design for Great Eastern signal boxes.

By 1997 there were still 90 of these in service, but with recent (2012) changes, and more changes expected 
, then it is unlikely that many will remain in service for much longer.
The GER always allowed contractors a certain amount of freedom within their specified design, and three early types evolved built by Saxby & Farmer, Stevens or McKenzie & Holland. By 1877 the GER were consolidating their own design, which featured a gabled roof, with large overhang, and weatherboarding. Windows were always two panes high in this design. A more ornate style of construction replaced this type in 1882, but this did not last long - the GER was never a rich railway. By 1883 brick boxes were being built to a plainer design, although 1884 saw some ornateness returning. For instance, March West box contained mock stonework in the gables, fancy window design and decorated bargeboards.
By 1886 timber boxes were being constructed again as well as brick examples but this - with some variation - was the last design for Great Eastern signal boxes.
By 1997 there were still 90 of these in service, but with recent (2012) changes, and more changes expected 
, then it is unlikely that many will remain in service for much longer.
Great Eastern Railway