Note: "Don't treat this as an infallible model against which you can compare all engravings --- they differ greatly through the years. Even the watches in this manufacturing batch (several hundred) had slightly different styles by issue batch (20 or more at a time), and there is no single magic feature to look for."
"Note how the luminous dots have that "over-spill" of some sort on this watch --- percolation of materials possibly, but I'm inclined to think a super-imposed varnish" - HM
