Button, Royal Naval uniform: pattern pre-1812?

On flat button. Twisted rope edge. On a circle with a smooth background is a smaller circle with a lined background. Within this circle are two fouled crossed anchors. Purser, pre 1812?

Object Details

ID: UNI5869
Collection: Uniforms
Type: Button
Display location: Not on display
Creator: Mann, J.
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London
Measurements: Diameter: 15 mm