Antique surgical syringe from the early 20th century by Charles Ferris of Bristol. Fashioned from chromed solid metal it would have been used for such purposes as wound irrigation and enemas, when large-bore syringes were needed. The component parts top and bottom unscrew and the plunger moves smoothly up and down. The catalogue page shown is from Thackray catalogue of the time. 
 
A nice clean example.
 
The syringe measures 24.5cm (9.75") in length when closed.