1781 silver spoon looking for maker

Found this amongst a bag of heirlooms i got given. Thought it was a regular silver spoon but it's really chunky. Seems it's actually old and the hallmarks fit 1781 London but the makers stamp is poor and only a distinct curly bit visible. It's bottom marked and no tax duty paid stamp so definitely from first half of 1781, can't see another like it online anywhere. Thought the design might look familiar to someone with a trained eye.