1980, 6 grp / 8 elm, filter size = ∅72mm, MFD = 0.9m
A big and heavy lens, it came with BT-72 hood in a good condition. The price was US$690 (@ $1 = 80Yen)
including sale tax in Tokyo @2011-Feb. It employs a floating system, the last element stays while focusing.
See Marco's > http://www.marcocavina.com/articoli_fotografici/TEST_85mm_f_1,2/00_pag.htm