The word gem-clip comes from the similarity of the wire to a Gem brand round wire paper clip. It is constructed from a round wire which is held in place by a long line-tie screw from the nose or tail of the lure. When viewed from the side, the width of the wire holder is vertical. You can detect the type of see-through hardware used in the Shakespeare catalogs by noting that gem clip hardware is vertical and flat plate hardware is horizontal when viewed from the side. After 1910, the hardware was changed from wire to a flat stamped or cut piece of metal with square edges as viewed from the outside of the lure.
Daylight still shows through the center of the lure on side hooked lures.
When viewed from the side, the width of the flat plate is horizontal. Additional information on Shakespeare hardware with photos. Shakespeare 1910 gem clip hardware compared to Pfluege r and how they differ. During the early period, there was a very distinctive more rounded prop used on the Slim Jim which resembled the width of the Rhodes prop, but with a pointed tip. However it is also observed on pre-1910 gem clip hardware lures.