Oil painting of still life with lemon

This is an oil painting on canvas depicting an interior still life scene. The physical composition features a wooden table draped with a light-colored cloth, upon which rests a shallow dish containing whole and sliced yellow lemons, leafy foliage, and an autumnal leaf. To the right stands a tall, ornate metallic pitcher or coffee pot with a curved handle and spout. In the background, a multi-pane window is open, revealing a vibrant green landscape and a blue sky, with sheer white curtains blowing dynamically inwards as if caught in a breeze. The room walls are painted in muted earth tones of green and brown. The owner has provided context, attributing the artwork to Onerva Borg, dated approximately 1983, and noting that the piece measures 55x70x3 cm and is unsigned. However, this user-supplied attribution is entirely unauthenticated by physical inspection, and the visual evidence shows no visible maker's mark or artist signature on the front of the canvas. The brushwork is expressive and painterly, showing a post-impressionist or naive stylistic influence consistent with twentieth-century domestic painting traditions. The visible condition appears stable with standard surface texture inherent to oil on canvas, though wear and age-related changes cannot be fully determined from a photograph alone.

Based on what I can see in the photograph, this is an oil painting on canvas depicting an interior still life with lemons, a pitcher, and an open window, measuring approximately 55x70x3 cm. Per user submission, the piece is unsigned and attributed to Onerva Borg, dated around 1983. I can't verify from a photo alone whether this attribution is correct, as the canvas shows no visible signature or maker's mark on the front, and I cannot evaluate the physical medium, canvas texture, or age-related pigment changes without a hands-on examination. My estimate of $600-$900 assumes that the work is indeed by the attributed artist, reflecting typical secondary market behavior for twentieth-century domestic paintings of this scale and style. However, this valuation is entirely dependent on future authentication. If physical inspection reveals the work to be a later copy, a reproduction, or simply a work 'in the style of' rather than an autograph piece by Onerva Borg, the market value would decrease significantly, likely dropping to the $150-$300 range as a decorative domestic painting. To move beyond an assumption and establish stronger market standing, would need physical inspection to confirm the materials, along with provenance documentation, expert appraisal, and comparison against known archival works by the artist.