Evocative Abstract / Architectural Vintage Snapshot dutch mending I have no information about

I have no information about the subject of this painting

with undulating sides giving it a great dynamism

which is without a bottom

Sold as found in an old wooden frame with gilded interior edge--which I think suits it fine

Evocative Abstract / Architectural Vintage Snapshot dutch mending I have no information aboutI think the subject here is the corner of the interior of a building, but it is the abstractness and ambiguity that make it interesting to me, all about form and shade and composition. (I'm really not entirely sure which end is up!) Both crisp and soft feeling, better in hand, glossy surface. 4 3 4" x 4", very good condition. C. 1960s 70s I would guess.