Sin-Kay 8mm Film Index
Sin-Kay 8mm Film Index, Sin Kay. Classic 8mm U.S.A. produced film serie.
Series starts with Cin-Kay (1-9) and continues with Sin-Kay (11-15). Last four loops were re-published by Lusty Lovers (most likely same publisher).
* More on this series by contour1 here Cin-Kay CK-4.