Good afternoon,

Thank you for contacting Mearto with your appraisal inquiry. These are really lovely!

These chairs are being advertised extensively in online retail sites like 1stDibs, Chairish, etc. Mearto's prices are based on auction sales, which are often quite a bit lower than retail or asking prices.
The following recent auction sales of this model of chair is provided to demonstrate the current/recent auction market for yours, though in my opinion, the unpainted rattan is really nice.
https://www.liveauctioneers.com/item/43148414_vintage-fox-lounge-chair-by-viggo-boesen
https://www.invaluable.com/auction-lot/viggo-boesen-1907-1985-vb-136-fauteuil-bambo-66c446bbb8
https://www.invaluable.com/auction-lot/dansk-design-ca.-ar-1940-kurvestol-bambus-vig-b004d97adf

Based on the photographs and information provided, and subject to examination, this is:
A pair of 'Fox' Chairs
designed by Viggo Boesen for E.V.A. Nissen
rattan
each 24 inches high, 28 inches wide
PROVENANCE: gift of a friend
$1,200-1,800 (represents a fair market value for auction purposes; retail or asking price may vary).

Please let us know if you have additional items to appraise, and thank you for using Mearto.