Shy Poke was used on rods, reels, minnow buckets, tackle boxes, and likely other items as well. Shy Poke was a trade name with many companies making sporting equipment for them, such as Tru Temper, Bronson, Great Lakes Reel and of course, Johnson Reel. They were marketed mainly in Wisconsin, Minnesota, and Indiana.
I believe that the Shy Poke made by Johnson is a Century 100a that is labeled "Shy Poke" with the addition of "S.M. 230" on the side plate. It is a combination of three colors with a black plastic cover, yellow side plates and a tan/brown frame. The cover is not consistent with the cover of a Century reel and may actually fit a different Johnson model. I believe that the "S.M. 230" is a catalog number of some sort.
Companies other than Johnson made reels marked "Shy Poke." I am aware of an open faced model with a shy poke (Another name for a blue heron) engraved on the side. It is an attractive reel, unfortunately I do not recall the name of the manufacturer, perhaps it is Bronson or Great Lakes...
Not much is known at the present time about the Shy Poke reels made by Johnson other than the fact that they are quite rare. I've never actually seen one in person.