That’s the one
I didn’t really know anything about it either until I came across a photo in the picture archive of the Vlissingen council — more can be seen of it
here (though note there’s also some there that are of different planes).
De Schelde (full name:
Koninklijke Maatschappij De Schelde, “Royal Company The Scheldt”, or KMS), named after
the river, built things like this:
and like this:
and this:
Those who’ve looked at
this thread of mine may have seen the present-day photo — where it says “DAMEN” on the large building on the right in that, it used to say “SCHELDE” until the company was taken over by
Damen. (The water in the photo is the river Scheldt.)
In the 1930s, the company decided that with the economic downturn, shipbuilding may not be as profitable, but aeroplanes did seem to be, so they purchased an aircraft design firm and (fairly unsuccessfully) tried to get into the aircraft market. The Second World War put a stop to that, basically, though during the war the company did make parts for German flying boats. In 1954, the aviation branch was taken over by Fokker.
Anyway, the S12 was apparently built as a business plane for one K. Geus van den Heuvel, hence the PH-KGH registration, in 1935, making its first flight in May that year. It was supposed to be a four-seater but apparently became too heavy due to construction mistakes and was considered a single-seater instead.
Over to you again, Jon