Thick cowhide leather on metal frame chairs:

S34 chair - Mart Stam

S34 cantilever chair - des. Mart Stam, 1926

S34 cantilever chair, designed by Mart Stam in 1926, is a chair with armrests, with thick cowhide cover sewed a chromium plated steel tube frame.

Also swivel-tilter/fixed chair, adjustable in height.