Maling plaques made between 1817 and c1830 (like the one below left) usually have the semi-circular impressed 'MALING' mark. Unmarked circular plaques (c1830–c1840) are often attributed to Maling if they are decorated with green-flecked brushstrokes (right below). See my September 29 blog post for another tentative link between these unmarked plaques and Maling.
It appears on circular plaques bordered by moulded leaves in a variety of colour combinations. The 'Maling' Wesley transfer has a diagonally hatched background with a unique flaw. Imagine Wesley is holding a cigarette between his fingers, and a white smoke ring is drifting from its end, which you can faintly make out against the hatched background.