Djurgårdsfärjan (“The Djurgården ferry”) is the name of a short ferry route between Old Town and Djurgården. It is serviced by a fleet of small ferries, all named “Djurgården” followed by numeral. The oldest date back from late 19:th century and were steam boats. This is not an exact model of Djugården 3 in particular (I did not find a blueprint) but it’s close.