Most probably the ferry depict will be never identified only part of a deck is visible. By the photo after which the stamp was designed is given:
Embarkation of the Australian Naval and Military Expeditionary Force (AN&MEF) for New Guinea. At the request of the British Government a special force, the Australian Navy and Military Expeditionary Force, was raised between 10 August 1914 and 18 August 1914, and despatched against the neighbouring German colonies. It was a volunteer force, enlisted partly from the naval reserves in the various states and partly from the militia. A portion of the military contingent is shown, being ferried down Sydney Harbour in course of embarkation. These were the first infantry to leave Australia.
Australia 2014 70c sg?, scott?
18 May 1942 launched under the name AGIR.
Tonnage 676 gross, 199 net. Dim. 186.0 x 29.1ft.
Powered by a 9-cyl. Sulzer diesel engine, ?hp, speed ?.
After the war taken by the United Kingdom and brought to England.
Rebuilt in a salvage tug, renamed HERCULES in 1949.
1950 Based at Gibraltar.
1954 Sold to Denizicilik Bankasi T.A.O., Kurturlu A.S., Istanbul, renamed in HORA.
From 1954 till 1958 as salvage tug at Büyükedere, Turkey.
From 1958 till 1968 as salvage tug at Izmir, Turkey.
1968 Taken over by the Port Authorities of Izmir and used as stationary pilot boat by Izmir port.
1970 Sold to Maden Tetkik Arama, and rebuild in an oceanographic survey vessel, the company is controlled by the Turkish Government.
Renamed in MTA SISMIK-I.
Tonnage 750 gross, 275 net, 353 dwt. Dim. 56.75 x 8.87 x 3.96m. (draught)
Powered by one Nohab-Polar diesel, 1.050 hp., one propeller, speed 13 knots.(most probably her engine then also replaced)
Bunker capacity 100 tons.
Number of berths total for 42 persons.
1972 She came in the news when there was a conflict between Greece and Turkey over coastal waters around Greek islands near the Turkish coast. The MTA SISMIK-I sailed then to these waters under escort of Turkish destroyers to carry out some survey work.
2006 given by http://www.equasis.org IMO No. 5154806, owned and managed by MTA Enstitusu at Istanbul.
Call sign TCVR.
Source: Lloyds Register 1955/56. Navicula. Some web-sites.