The 1893 threepence is listed as having three variations.
The first (left) is, as might be expected, like the 1892 issue with the 'Jubilee head'. The third (right) has the 'veiled head' and like the 1894 issue has a slightly different '3'. Shown centre is a third version, a 'mule' having 'Jubilee head' and the later form of '3'. This is my interpretation of them.
In SCWC, the centre and left ones are described as 'open 3' and 'closed 3' under KM#758 (in that order, which does not seem entirely logical) and the right one is KM#777 as it has the later obverse.
Now, my scans do not show the different '3' very clearly and even using an engineering glass the difference in the gap between the bottom of the diagonal and the ball of the '3' is almost unnoticeable, probably less than 0.25mm. I can only add that pre-1893 coins appear to have a smaller gap than post-1893 ones.
I suppose that my real question is whether I am looking for the different '3' in the correct area of that figure. I should be very glad if someone would advise me further on this. I have no idea what form the 1893 Maundy version has, although as it is shown as KM#777 I assume that it is like the one in the right of my scans.
Bill.