GREAT WESTERN RAILWAY, G.W.R.
BLOCK or CLOSING SWITCH
A superb example of a small, early pattern, mahogany and brass Signal Box Closing Switch containing 10 pairs of contacts.
There is no maker's mark so it was most likely built by the GWR at Paddington or Reading Signal Works.
The base measures 296mm x 174mm and it weighs 3.07 kg.
Please see pictures