19th Century Mahogany Extending Dining Table

Mahogany Extending Dining Table with two original leaves, raised on turned legs to castors, and stamped by the maker, Johnstone & Jeanes, New Bond Street, London [partnership founded 1842].  This table would seat 8 people when fully  extended.

dimensions
42"diameter without leaves (see photo no.4)
extending to 77" (one leaf 20 1/2", one leaf 14 1/2")