Ikoflex II (851/16 Lcr): 

c1937. There is a focusing lever which dates this TLR as being made in 1937. Later versions (1938/39) had knob focusing. The lens is a 7.5cm f3.5 Carl Zeiss Tessar in Compur Rapid T, B, 1-1/500th. This model is considered a variant and has the better Tessar lens. Zeiss Tessar optics were more highly corrected, and provided high quality results. All metal parts are heavily chrome plated with a solid well built body. These also came with a Triotar lens which was a simple Zeiss triplet lens, which was probably not as good as the Tessar lens version.