Ed,
the sear safety was re-finished along with the rest of the piece. No way to know for sure, but I believe the pistol was a 4" P08 - altered by notching the chamber and adding a totally new artillery barrel.
You know I "really, really" wanted it to be a genuine police artillery; if there was even a 5% chance- I would have kept it.
However- If anyone can supply me with the original artillery barrel numbered to the piece, I'll humbly and excitedly change my mind!
But it is not an artillery, as George said it is - a boosted" double date" Erfurt police P 08.