"hi there my name is fabricio
I havea piece of stone with winston churchill big coin dating 1941 and at the back of it is writing by hand ( I HEREBY CERTIFY THAT THIS STONE WAS PART OF THE STRUCTURE OF THE HOUSES OF PARLIAMENT DAMAGED BY ENEMY AIR RAIDS ON 10TH MAY 1941
( SIGNED ) VINCENT BADDELEY ON BEHALF OF THE READ + AND ST JONHN FUND
AND SOME SORT OF STAMP AT THE BOTTON 13 may 1941
I do not know about this things so I was wondering if there is any value?