Okay, I've popped mine off and am looking VERY closely at the construction. The Tachy scale is not just an insert. The bezel consists of 2 pieces. The outer stanless knurled piece and a pvd metal inner piece. The pvd piece is not that simple to make. It is conical and stepped then pressed into the stainless ring and probably glued. Not a simple insert like Omega and Rolex. The Autavia bezel insert has been turned on a lathe and then pvd coated the Tachy scale. It is apparent that an exact reproduction would be too troublesome and costly. Magnification is still not conclusive if the Tachy scale is sprayed (painted) or applied (very thin sticker). Either way, my next step is to take this bezel (generously loaned) and get a high quality scan. I will see how thin of a metalized sticker I can have made. More to come later.
dave