Hi mike
i have an old omega 2500 . I have took some photos of the seconds pin ( with out the cannon pinion) then one with the cannon pinion attached . The 2500 is really a modified eta 2892 same family eta 2824 /2836 your first picture is 100% right just missing the hour wheel . All the seconds hand will fit if there from the 2892 /24/36 hope this is of some help