Jul.Laack& Sohne Rathenow Doppel Anastigmat DIALYTAR 1:6,8 190mm lens in good retailer condition

Jul.Laack& Sohne Rathenow Doppel Anastigmat DIALYTAR 1:6,8 190mm
With a screw mount of appr. 3,5 cm.
messing lens of the beginning of the 20'th century, Germany.
Renowed optics at the time. At least 17 blades aperture. Moves smooth.
No. 37894
Lens surfaces are not entirely untouched by time but no big scratches or cleaning marks
on the aperture ring the numbers are: 6,8 = completely open, retailer 9,12,5 , 18, 25, 36, 50

Will be sent with signature required traceable ensured service