Prima Mushroom Concealed Fix Un-Sprung Mortice Door Knob (60mm Diameter), Satin Brass - SB2029 (sold in pairs) from Door Handle Company

Prima Mushroom Concealed Fix Un-Sprung Mortice Door Knob (60mm

Prima BC2029 Solid Brass Mushroom Concealed Door Knobs - Polished Chrome

Satin Brass Door Knobs - Door Handle Company

Prima Mushroom Concealed Fix Un-Sprung Mortice Door Knob (60mm Diameter), Antique Brass - XL2029 (sold in pairs) from Door Handle Company

Mushroom Door Knob Old English Collection

Harrogate Round Mushroom Mortice Door Knob in Antique Brass- OE58MMKAB at Simply Door Handles, OE58MMKAB

Harrogate Round Mushroom Mortice Door Knob in Matt Gun Metal- OE58MMKMBN at Simply Door Handles, OE58MMKMBN

Mushroom Mortice Knob (Unsprung)

Schlage Accent Satin Brass Interior Bed/Bath Privacy Door Handle in the Door Handles department at

Schlage F40 ACC 608 Accent Door Lever, Bed & Bath Privacy Lock, Satin Brass