If it has a slider, and a rounded endplate on the left, and the end-float adjustment on the right, under the handle, then the slider operates the ratchet...the mechanism may have been removed to enable the use of a casting "Bullet"by a previous owner. From 1974, when the 6500C was introduced, almost all the reels were described as "Hi-Speed".
Hope this helps,
philtherod (and occasionally, reel as well!)
Hope this helps,
philtherod (and occasionally, reel as well!)