38 inch cannon ID

[BartGibraltar]

This 38 inch (about 97 cm) cannon is found in Gibraltar so is most probably British or Spanish. Can anyone ID this?

 

[H-2 CHARLIE]

Now that is friggen COOL dude . The bronze alone is worth a small fortune .
No expert but my guess is Spanish because of the smooth lines .

 

[Mackaydon]

My first thought: It's iron, not bronze; and probably 19th C British; IMO
Don.....

 

[Smithbrown]

it is iron, not bronze. Not sure about origins. If it wasn't for the raised vent block I would plump for Spain or France. You should look for marks, on the face of the trunnion or in front of the touch-hole. And late 18th, early 19th century date.