A special little bénitier as it comes from a pilgrimage to Lourdes on the 100th anniversary of the miracle. 
The bénitier is varnished wood with a glass holy water font, silvered plaque of Mary with a lovely patina (this would clean) stamped RC and under a banner saying souvenir of Lourdes 1858-1958. There is a hanging hook on the rear. 
The plaque is 16.5cm or 6.5" tall.