1903 symbolist painting: by Edmond van Offel?

Lauritz, from Denmark, sells on 28 June 2017 an "Unknown artist, 1903, signed E.V.A / G.V.A.?" woman's portrait, estimated at 134 Euro.

The typical symbolist work, coupled with the signature, reminds me most of the works of Edmond van Offel (1871-1959), artist from Antwerp who is mostly known for his book illustrations.

He often worked in an Art Nouveau-inspired style, but his works also can be Symbolist (like here) or more realistic. The above drawing shows a woman who is clearly similar to the one in the painting.

If it is by Van Offel, it should be worth around 800 Euro probably.