A very good 18th century lignum vitae coffee grinder in the shape of a bullet. Pinto describes this shape as being late 1600's but in Treen for the Table they are described as being late 1700's.
The top unscrews to place the coffee beans in and then a folding handle which is stored in the bottom compartment fits on the top to turn the steel cogs inside. The coffee is collected in the bottom compartment. This antique treen coffee grinder is in excellent condition with a very good colour and patina as well. It measures approx 25cm h x 6.5cm w at the base, C1780
 
For more information on coffee grinders see our blog https://www.opusantiques.co.uk/product-page/antique-treen-coffee-grinder