Rare variant of the wavy enamel mourning band for Irish landowner and politician George Putland Esq (1745-1811).
A wide Regency 22 carat band with raised milled borders with a wavy black band enamelled within a white enamel band, makers mark MG for London goldsmith Michael Gamon.
The only other example of this form I have seen is in the British Museum with the same maker MG for Barbara Davenport 1812. A short lived transitional style.
 
The Putlands arrived as blacksmiths in Dublin in the seventeenth century and steadily accumulated wealth and position. Thomas Putland (1650–1723), banker and property speculator, bought the lands in Co. Cork, Co. Wicklow, Co. Kilkenny, and Queen's Co. that formed the backbone of the family wealth for two centuries.In 1776 George Putland was made high sheriff of Co. Wicklow and that year purchased  the parliamentary seat for Ratoath, Co. Meath, which he represented 1777–83. Putland's  civic posts included those of governor of the lying-in hospital (1776–1800), governor of the charitable loan society (1778–1800), and governor of the charitable musical society (1781). He was a member of the Dublin Society from 1770 and of the RIA from 1797 to 1800. He was survived by his wife, Kitty (m. 20 January 1779), daughter of the Hon. John Evans of Bulgaden Hall, Co. Limerick.