I believe this is my new favorite blog. A remarkable archaeological illustrator with some very interesting artifacts. I never even considered the antiquity of sliding calipers. I hope she puts more illustrations up sometime!
Late medieval wooden artefact: caliper, found in latrine in Gdansk, Poland. Hand drawing by Helena Michel, pencil on paper technique.
Ilustracja archeologiczna późnośredniowiecznej drewnianej suwmiarki, znalezionej w latrynie podczas wykopalisk na terenie Centrum Dominikańskiego w Gdańsku. Rysunek odręczy na papierze, autor: Helena Michel
Preindustrial Craftsmanship 