2 и 1.25 в одном.Судя по интернету начало 80-х годов.
Этот13 мм тип1 первый в мире наглер.The very first Nagler was a 13mm, seven element, fully
corrected eyepiece that was dual barreled (both 1.25 and 2”
barrels). Designed by Al Nagler in 1979, revised in 1980, it
was commercially produced and sold in 1981/1982