Name is ADOLFO LOUREIRO - a suction dredger

I think that this is the one built in Germany in 1930 for the Portuguese Government (Direcção Geral dos Serviços Hidráulicos e Eléctricos). Initially operated in Metropolitan Portugal, particularly at Aveiro, it seems that she was sent to Lourenço Marques, Mozambique some time after World War 2.

867grt 339nrt, 61.13 x 10.08 x 4.56m, steam 750ihp
built 1930 ??, Dresden [or that may be just where the dredging equipment came from]

My first impression is the hull of an old passenger/cargo steamer. More informatios will be very welcome. Very interesting !!!