Slavoljub Eduard Penkala (1871 – 1922), an engineer and inventor. He created the mechanical pencil, the first solid-ink fountain pen and the hot water bottle.
Zagreb, Croatia - 2018
Slavoljub Eduard Penkala (1871 – 1922), an engineer and inventor. He created the mechanical pencil, the first solid-ink fountain pen and the hot water bottle.
Zagreb, Croatia - 2018