The gap and dial construction was due to the slenderness of the case and the fact that a 3 piece dial would not fit iir
.
. I have tried a few attempts to do a DIY one, 37mm dial on 39mm back plate but never got spot on. If the gap is too small then it will not read at all: likewise if you use a blackened or aged plate the gap will become less pronounced. For this be southy got it spot on IMHO.
If i was mounting in a bronze case I would blacken the plate:for ss leaving nos accentuates gap. Again as with all builds this is very subjective and gen images can be varied: I included that gen link of one build to show how little and large the gap can look depending on the angle of the photo, distortion etc. Scroll down through that and in some images there is nearly no gap visible, then front on at slight angle the gap is hugely pronounced: and this is h same build! Actually using a very small ap hs an interesting effect of making a build look more slender, and I have done this before on a silix build where the overall build height was higher than I wanted.
I remember looking at 6154 gen shapes for reshapes: oyang's seemed to be the most accurate until I came across a gen which looked identical to athayas! So there will always be a bit of variety in the handmade gens anyway IMHO. For hands I just prefer this type to the ones pictured also...