Hill, Van Santen, Steadman & Simpson
Slide fastener slider
 A slide fastener slider includes a slider body having a mounting hole extending at least through the thickness of an upper wing of the slider body, a circular disk disposed on the upper wing with its central guide hole aligned with the mounting hole, a pull tab pivotally connected to the circular disk, and a headed retainer pin extending loosely through the guide hole and firmly fitted in the mounting hole to rotatably retain the circular disk on the slider body. The circular disk is substantially concealed by an enlarged head of the retainer pin and hence the slider is sightly in appearance. The mounting hole in which the retainer pin is firmly fitted extends through a guide post of the slider body so that the pull tab is firmly retained on the slider body against detachment even when the pull tab is manipulated with a severe pulling force. 
Yoshida Kogyo K.K.
A Y Y
A44B Y10T Y10T
inventional additional additional
Hiroshi Susumu Yasuharu
Mizuno Ishii Terada