From the Sir James Martin offical biography
It is impossible to calculate the success of the cable cutters, but on the basis of the feedback that he received James estimated that in excess of 500 aircraft and 2500 crew were saved by the cutters.
No problem, tempted to take the cover off now and have a look :D
Let me know if you want any more photo's, we also have a 20mm flat feed machine gun mechanism that Sir James designed.