David. I did a little research on the switchable handles. I have Mitchell 4400 series reels that all switch handles, as well as the Johnson Chairman series reels. Here's a Johnson Chairman 830 next to a Mitchell 4450 and a 4430. All started production in 1979. Johnson didn't have covers over the screw on the Chairman reels, like they did on the 700 reel. I went through a bunch of Zebco catalogs and found in 1973, Zebco had a new XRL80 that switched. So who was the first ? I really don't know. Also, remembered Gene writing somewhere, that one of the Chairman handles, fit the 700 reel. It's the 830. Bottom pic shows the comparison. One is the 830 handle and the one under the plastic is the 700. Another good thing to know, is that although the drive shaft is different on the 700, compared to the 63. The drag knob, which is right (63-1182) will work on it, it looks a little different, but it works.