Back in my home area I can look at a gravestone and usually be pretty accurate about who made it and when. I can still tell Barre from Georgia granite, etc.

Another true story:

The monument shop I worked for had been founded about 1870 by a man named, let us say, Schmidt. Even though the founder was long gone, it still bore the name "Schmidt Monument Company" and people would come in looking for Mr. Schmidt.   The boss and current owner was NOT named Schmidt, and if a customer came in when his wife was in the office (which was usual) there was no problem. However:

A customer walked in and asked for Mr. Schmidt. The boss said that he was across the street in the cemetery. "Will he be returning soon?" the customer asked.

"God, I hope not!" replied the boss.

At this point the boss's wife walked in and got things sorted out.