Serial number is 1949 manufacture and I agree it looks multi-coated but Zeiss Jena was not making multi-coated binos that early. The IF Dekaris marking on a CF bino makes no sense either. 1/6000 references the graticule graduations but on all German binos I've seen it's usually 1/6400. Other than the markings, though, it looks like a late 1970's -early 1990's CZJ Dekaris. The non factory markings are unusual too. A fake of some sort but an intriguing one.