Thanks for that, I have just measured the iscription front and rear where possible with a micrometer and they both appear to be 0.1 MM deep and are both the same to the touch. Out of my 30 SAs I do have several of the earlier ones that tend to be a bit deeper.
The runner mark scratches,do run over parts of the dedication front and rear but only the far edges. Both inscriptions are deep but you can see where some burnishing has worn off in a few places with a magnifying glass outside of the centre band.
