Jber,
In this case you have something that looks like a (basically) elliptic dial with an asymmetry; the not quite mirrored part from 30 to 60 are narrower than their 0 to 30 counterparts, and there are irregularities in the thin ones (presumably unintended and to be avoided in the new one).
Smart Guides are your friends, working on top of the (locked ) image.
You may:
1) Start by trying to ClickDrag out an Ellipse with the Ellipse Tool to hit/fit the shape formed by the upper ends; that should (also) give you the (rotation) centre of the direction of all the hash marks; obviously you will need to adjust it which you can do by ClickDragging and/or changing H/V values or whatever.
2) You may then create concentric ellipses hitting the lower ends of the short, medium, and long hash marks, by copying the first one and then reducing the H value proportionally in the Transform palette and using Ctrl/CmdEnter to keep the Ellipse proportions.
3) After those you may ClickDrag with the Line Segment Tool from (the centre of) each top of the hash marks to the centre (where Smart Guides say center), using the Stroke Thickness corresponding to the short thin ones; you may either:
3a) Do this for all the hash marks or
3b) Only do this for the 5 and 10 marks and then (as an(other) approximation use blends between those for the short thin ones.
4) Group the different kinds of hash marks
5) When you have all the long lines from the centre to the tops in three Groups (one for each kind), you may adjust the Stroke Thickness of the 5 and of the 10 marks, then in the Stroke palette change to Projecting Cap.
6) You may then use sets of (copies of) the ellipses as Clipping Masks as follows:
6a) Copy the largest top ellipse twice,
6b) For each Group select one top ellipse and the relevant smaller ellipse and Ctrl/Cmd+8 (Compound Path), then ShiftClick the corresponding Group and Ctrl/Cmd+7 (Clipping Mask).
This will cut the long lines.
If you wish to get rid of the three Clipping Masks and the invisible bits, you may select each mask and perform the dirty destructive deed:
1) In the Transparency palette/panel dropdown list select anything but Normal (Multiply is fine; this step may be unneeded in your version, you may try without it);
2) Object>Flatten Transparency, just keep the defaults including 100% Vector;
3) Shudder (optional, unless unavoidable).
This will crop everything to the Clipping Path, and with this, everything should be cleaned up.
AdChoices