So, lots of people who make stuff in wood (going back a few hundred or more years) made a mark on the stuff they build (assuming it’s good enough). Usually in an out-of-the-way place, even one where you’d have to disassemble the piece to find it; like signing one of two faces before you glue them together.
Sometimes it was a simple stamp made with a metal stamp and a few taps of a hammer:
Sometimes it was a paper sticker, and sometimes it was branded:
This wasn’t done out of the same sense that triggers graffiti by the way – some guilds from the 17th century onwards made it mandatory to mark every piece a workman made. Not every guild, but enough that it was considered commercial rather than odd or vain.… Read the rest