What Young Bucks said was SOP back in the day, when all scopes used a slide tension adjustment for elevation and windage knobs.
Early Leo Vari X II's was the last of the Leo scopes I think that used this system, except it can still be found nowdays on Leo Rifleman scopes last time I looked at one long time ago when they 1st came out.
FWIW the slide tension system worked OK - just not as good as the more current positive click system - just gotta be aware of it and respond as needed. I kept a long handled screw driver in my kit with a wooden handle, instead of a plastic one, so as not to dent the adjustment turret thin aluminum dust caps.
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