Bent laminated birch plywood, original paint paint.
Impressed '11' to underside of both arms.
Another pink example is in the permanent collection of the Minneapolis Museum of Fine Arts under accession number 88.13
https://collections.artsmia.org/art/3707/paimio-chair-alvar-aalto
Produced by Huonekalu-ja Rakennustyötehdas Oy Turku.
H.61cm/24'' W.60cm/23,6'' D.80cm/31,5''