A pair of antique obstetrical birthing forceps, axis traction "Neville-Barnes" type. When closed they measure 46cm in length including the traction handle when fixed in place. In good condition with some marks and tarnish. The forceps carry the military broad arrow confirming that these are British military-issued axis-traction obstetric forceps.
Axis-traction forceps apply traction in line with the axis of the birth canal, reducing maternal and foetal injury and allowing for “high” forceps deliveries at or above the pelvic brim—a requirement for military field medicine and remote colonial/overseas military hospitals, they would have been used by the Royal Army Medical Corps. 
British government medical contracts for axis-traction forceps of this style were most common from World War I through to World War II.
 
This obstetrical forceps type was developed by Charles Cullingworth, they grip and rotate a baby’s head during difficult childbirths. The curved blades fit the baby’s head and the curve of the mother’s pelvis. Gynaecologist and obstetrician Charles Cullingworth (1841-1908) modified existing designs. He strengthened the materials using only metal as well as strengthening the screws used. 
 
The catalogue entry showing a similar pair is taken from the Thackray catalogue dated 1900.