Carl Zeiss Mirotar 5.6/1000mm

extremely rare and impressive mirror lens by Carl Zeiss, only around 28 lenses were made between 1964 and 1970 to special order, in near mint condition, clean lenses, professionally adapted to FL mount (probably modification made to order by Zeiss, incl. original Contarex mounting ring), from a small batch of 5 units made in 1970, in near mint condition, perfect optics, inkl. original front cap, set of 4 filters in mounts, large wooden carrying case with keys