LONDON.- An Ottoman gilt bridle, breast-plate and crupper taken from the residential quarters of Tipu Sultan (1750-99), Sultan of Mysore (Seringapatam), in the 18th Century, and brought to England by Field Marshall Sir Stapleton Cotton, 1st Viscount Combermere (1773-1865) is for sale in Bonhams Indian Islamic sale on April 5th in London. Made in Turkey of red morocco, the brow-band, head- and cheek-pieces are faced with interlocking rectangular plaques of gilt-brass, each cast with an eight-petalled flowerhead design. The decorative scheme of the bridle, in particular the presence of the crescent moon, is in keeping with Ottoman military decoration of the late 17th and 18th Centuries. In the 17th Century, the Ottoman Empire spanned three continents, controlling much of Southeastern Europe, Western Asia and North Africa. In 1794 at the age of 21 Stapleton Cotton was appointed Lieutenant-Colonel of the newly formed 25th Light Dr