A very large set of brass Walker's Patent Wardrobe Hooks.
This form of an expandable set of hooks were made and sold by a number of companies under Walkers patent of 1864, which is stamped to the brass. Tonks were known to have made them and they can be found in the Army & Navy CSL's catalogues. They were produced in 3 sizes, small, medium and large. The medium size are the most commonly found with this large set, the least.
The hooks are made of solid brass but the bars are made of brass wrapped around steel. The practicality of the hooks are that they can be adjusted in size to the space you have available. Circa 1900.
Size as shown in the 1st image in its mid position.
The smaller hooks are sold separately and only shown for comparison.