Re: Older Redfield
In the 60's/70's Redfield's scopes were considered top line optics and the primary differences being - you have noted - the type of adjustment knobs used - accu-track for precision adjustments and standard hunting type low. Redfield also had a wide selection of reticles, including the accu-range. I still have my 6-18x (with a tapered X-hair & circle center dot) and a 4-12x w/ the accu-range. Being a 2nd focal plane reticle the stadia lines change their subtended angle (not their apparent size)with the power change and directly correspond to the numbered scale in yards (200-600), low to high power, with an 18" target being bracketted. They were and still are excellent scopes. jackdm
ps - I believe you could get any reticle with either type.