The Braithwaite knife represents a milestone in the evolution of manual split-thickness skin graft harvesting. Introduced in 1955, it refined earlier controlled-thickness grafting instruments, notably the Humby knife of the 1930s, by incorporating replaceable long blades that could be exchanged without dismantling the handle. This innovation addressed practical challenges encountered during high-volume graft harvest, improving operative efficiency. The classic Braithwaite design features an adjustable roller or guard system regulated by knurled collars to control graft thickness, alongside a spring-loaded blade holder to ensure secure fixation and rapid blade change. Despite these advances, recognised limitations included skin roll-up around the guard and variability in graft thickness during prolonged harvests. These issues prompted further refinements, most notably the Cobbett modification in 1968, which stabilised guard mechanics and reduced rotational instability. Collectively, the Braithwaite and subsequent derivative designs formed a family of robust, low infrastructure manual grafting instruments that bridged the transition between freehand grafting and powered dermatomes. By improving reproducibility of graft thickness, these knives contributed to reduced donor-site morbidity and improved graft take, key determinants of reconstructive outcomes. Their durability and simplicity ensured ongoing relevance in civilian burn and trauma surgery and suitability in resource limited settings. The Braithwaite knife exemplifies surgeon-led innovation driven by clinical necessity and occupies an important historical position in the development of modern reconstructive surgical practice. References: 1. Cobbett, J., A modification of the braithwaite knife. British Journal of Plastic Surgery, 1968. 21(2-3): p. 216-217. 2. Ameer, F., A. Singh, and S. Kumar, Evolution of instruments for harvest of the skin grafts. Indian Journal of Plastic Surgery, 2013. 46(1): p. 28.