The NGC census has 6 in AU53 or better. The PCGS one has just two. Obviously there will be some raw examples out there so I would extrapolate the population in VF or better to be around 20-25.
As a sixpence collector, I'm still waiting for one of those to come to market.
Looks OK to me. Carbon spots are less distracting on the reverse and they are not in focal areas (except the single spot on Britannia's hand). And a coin always looks better when it didn't cost very much :)
This is very interesting, thanks Gary & RCL35 for your comments.
Below is an un-barred 'A' example I recently purchased and it appears to be centred between the lighthouse and the inner rim and more of a larger letter 'type' A when compared to the smaller 'triangular' A on your example which is contiguous with the inner ring. Gary's example appears to almost touch the lighthouse if I'm not mistaken and it too seems more of a triangular 'A' in shape.
Some references list two varieties of the "A" to the left of the lighthouse. The F289A (smaller A) and the F290A (Larger A). Freeman only lists the 290A and also lists it as unbarred. My example is the larger "A" closer to the rim, and is unbarred (F290A). I think Gary's example is a smaller "A" and is closer to the LH. I do not know if Gary's example is barred or not. Here is my example.
Also pleased with this 1904 penny I got from David Craddock. It's not the easiest date to get in tip top condition. Uncirculated with 95% lustre - ever so lightly toning. Unfortunately, evidence of a fingerprint on the reverse, and there is a small carbon spot on the obverse. Think I've finally resolved the colour disparity.