Spitfire Wreck Italy, Help

I received this e mail and copy here. I haven’t changed anything to improve the English, but I think you will get the message.

Any help or info welcome and apologies if it turns out to be a hoax.

I write you about a wreck of spitfire that has been found near assisi in umbria ( italy ) yestrday. this spit crashed around september 1944. today I look the airspeed indicator where there are this number and reference: mk IX F. n°. 13502/42 Ref. n°. 6A/587. May you help me about the squadron and the name of the pilot? I know it is very difficoult….
tank you very much