N F Ramsay Brass lock

Hi Guys ,Bought a reclaimed back gate from the salvage yard this lock was attached it made by N F Ramsay a lock and safe makers from newcastle upon tyne england what shut down many years ago ,made of solid brass,n f ramsay did supply locks for buckingham plalace so i have been told not sure of the age and what it was made for ,Hope you like the lock,Thanks Again