"Here lies Mr Lorenz Stumpfögger, Citizen and ..., died 13 Sept 1709 in his 67th year."
It's a little the worse for wear, but this paint-on-metal tombstone isn't 300 years old.  Some relative has had this re-done recently, certainly within the last 30 years.  This is only one of several similar markers of similar age and similar condition.  Quite obviously, someone local is still looking after the remains of great-grand-uncle Lorenz.