Attached my Zeiss G.Z. scopes. Top is Zeiss G.Z. No. 550 marked, second G.Z. No. 322, third, G.Z. III 2264, fourth G.Z. III 2286, bottom is G.Z. IV 1909.
Note that the two G.Z. on top have different view in angles, despite being the same model. Top has basically same entrance angle as leaving...