Old Burris 3x9 range finding scope info needed!!

[sunflake]

I called Burris today and tried to describe what this scope is but the very nice young lady is having a hard time finding any info for me. What I do know is it's about a 1981 ish model. It has the normal cross hair and below the horizontal hair are 2 what I believe are called stadia wires.
As you turn the power up there is a dot that drops down from the middle of the cross hair. When you get the deer bracketed you put the dot on the deer. It's a bullet drop compensator.
IIRC there is also yardage marked on the ring in front of the eyepiece. Anybody know any info or know where I could get a copy of the manual? Burris doesn't have anything.

 

[Tom]

Range test it with a deer decoy or something that big, then you can make a table to match the bullet drop for which bullet you shoot, right?