I am unsure of the origin or maker of this sofa, but it shares many design features with Nanna Ditzel’s work. The only markings are found on each cushion, a tag with the name Ormavyl:
“a unique upholstery fabric, two-way stretch velours type, very soft but yet highly durable to wear & tear, that was created in France in the 1940’s. ‘Ormavyl’ had been very popular in the European automotive Industry with Peugeot, Citroen, Renault, Chrysler, et cetera…once introduced to the States, Herman Miller called this product “Polynit” & promoted it on its famous ‘Ergon’ chair" – Carl Bongaerts, founder, Bongaerts Contract Fabrics.
Although this sofa looks good from 10 feet, it should probably be reupholstered.