thanks for the offer, that would be a little too much of a bite for me.
I have been told by those that know here on the boards that it is all original configuration. The triggerguard and floorplate parts were provided to the steyr factory(BNZ) by Oberndorf, thus the BYF stamp as seen in the pics. All the numbered bolt parts match with the receiver and the laminated stock is unnumbered under the barrel which I am told is also normal. It has no import markings so could have been a bringback.