It all started in 1920 so in an era when all Zeiss binoculars were produced in one place, in Jena. The 8x30 model was launched at that time exactly, already in two versions, with individual focusing (Deltrentis) and central focusing (Deltrintem).The binoculars were a small, classic instrument with an achromatic objective lens (a glued crown and flint glass doublet) and type I Porro prisms with air between them. As the eyepiece they decided to use a wide-angle (68 degrees) Koenig system consisting of four elements. The Carl Zeiss Jena Deltrintem 8x30 with original box and a dedicated casing, number 1098494, produced in 1921. Leather case stamped with retailer mark C.B.Vaughan, Guns, Rifles & Binoculars, 39 Strand London, specialists in gun fitting. Some scratches and signs of wear, otherwise the binoculars and the leather case in a very good, working condition.