Need help zeroing a type 3 Weaver M73B1 rifle scope

[ghost07]

I am trying to zero my M73B1 rifle using the instructions on pages 20 & 21 of TM 9-270 dated 28 September 1943. According to the manual part of the procedure for both windage and elevation adjustments is to turn both the windage and elevation screws clockwise as far as they will go. Next turn the screw counterclockwise until the “index” points to “0” on the windage/elevation screw. I am trying to determine exactly where this index mark is. Can anybody help me with this? Thank you for your help.

Larry

[SkyKid]

Not really sure as I have zero knowledge or experiences with that scope
But wouldn't the index mark be where I circled on the pic

[waco16]

Not really sure as I have zero knowledge or experiences with that scope
But wouldn't the index mark be where I circled on the pic
Attachment 133797

That's exactly where the index mark is - the thing with the 'later' M73B scopes though, is that the graduations on the windage and elevation screws are on inexable plates - loosen the central screw and you can rotate the plate to zero against the index mark.
Best thing to do is to bore sight the rifle and zero to suit.
The thing I've found with mine is once its zeroed its not very accuarate to return to zero (if that makes sense) - all down to the primitive spring arrangement inside the scope

[ghost07]

Thank you so much guys. That’s what I was thinking but wasn’t sure TM 9-270 says absolutely nothing about where the index makers are. Your right, those 2 groves ate the only thing that makes sense.