I think this may be a sister gun to this gun.
http://wiki.fibis.org/index.php?title=Historic_Guns_of_British_India 
Bronze 9 pounder. D Presgrave, Cossipore (East India Company) 1838/39 Produced by the East India Company’s gun foundry at
Cossipore near Calcutta. This cannon was one of a set intended for presentation to Maharaja
Ranjit Singh by George Eden, Lord Auckland, and Governor General, on the conclusion of treaty negotiations in 1838. The guns were presented with 200 rounds of shot and shell intended for a planned Anglo-Sikh invasion of Afghanistan.
The salute was fired by the howitzers that G. has had made to present to Ranjeet. They are very handsome, ornamented more than our soldiers think becoming, but just what Ranjeet would like; there is the bright star of the Punjab, with Ranjeet’s profile on the gun and Captain E. Says that thousand of Sikhs have been to look at these guns, and all of them salaam to Ranjeet’s picture as if it were himself. Emily Eden (Lord Auckland’s sister who accompanied him on his state visit to the Panjab) ‘Up the Country’; Letters from India Ch XXV, p 189 The guns were captured 7 years later in action at the
Battle of Ferozeshah, not far from
Ferozepore where the guns were first presented.
