Photo: Florian Hardwig. License: CC BY-NC-SA.

PTL VielzweckandPTL Tephe. Tephe — the one with the striking underline connection — is inspired by letters found on an East-Berlin tenant directory from the GDR times: the movable white plastic caps included a thick underline with which they could be fixed onto the wooden board.

Photo: Florian Hardwig. License: CC BY-NC-SA.