This is a 3pdr Light Common Gun cast around 1782 at Woolwich by the Verbruggens. It is 3ft 6inches long and weighs 2cwt 3 qtr and 4lbs and is of the bronze version of the Armstrong pattern of guns.
It is of interest mainly for two reasons, firstly the founders Jan and Pieter Verbruggen who were, to use the modern term; head hunted to modernize and refurbish the Royal Brass Foundry at Woolwich in the late 18th Century and are among the greats of British gunfounding.
Previously they had considerable experience of gunfonding in their native Holland and then did much between 1770-1785 to improve the quality of British bronze guns. Jan died in 1781 and Pieter continued as Master founder until his death in 1785.
Athough a catalogue of surving Verbruggen weapons attributes this gun to both of them, if as it states, it was produced in 1782 it must have then been made by Pieter.
Secondly the carriage is of real interest. It appears to be heavily restored, original, late 18th or early 19th Century disappearing or elevating carriage.
That is to say the carriage could be elevated to fire over a rampart and then be lowered, either by the action of the recoil or manually, to allow the gun to be reloaded in safety.
As such it is, as far as is known, unique.
This carriage is being currently survey to see how much work is required to restore it.
