Bedankt Kees, I fully agree with your explanation.
These ships called indeed at Surabaya in those years (1930's)
We will stick to these suggested vessels by you.

Thanks

Chris

Looking to her livery (white band on black hull, and apparently a yellow funnel, although it is diificult to discern between yellow and black, the ship must be a memeber of the fleet of the London-based Asiatic Steam Navigation Co. To me she looks like a somewhat modified WWI standerd cargo vessel,but maybe she is just of an earlier date. Asiatic SN had two standards, both built by Swan, Hunter & wigham Richardson:
Pasha, 5307 GRT 1919 laid down as War Chamois (yard no. 1121) and broken up in 1950
Pundit, 5305 GRT 1919, laid down as War Moose (yard no. 1123) and broken up 1950. Unfortunately, I have not found any picture of these vessels. If this ship is a slightly earlier vessel, the Sikh and Nizam (both built 1914) could be ruled out: I have photographs of these ships in my collection and they are certainly not the depicted ship on shipspotting.
Best wishes,
Kees