FWIW, The PB marked M1 trigger group I got in the mail on Friday was at least as bad as the one the OP posted, and the only thing PB about it was the TH itself. The rest was SA. It was also heavily wire wheeled with zero remaining finish, so there was no active rust - just the remaining deep pits. It looked to me like someone else got it, tried to see if it would clean up well enough to do a simple re-finish. It didn't. And they returned it before it got shipped to me.
It's already mailed back with a tersely worded note. Luckily for most, the last 3 or 4 posted in the M1 build thread in the battle rifle forum looked really nice. I personally still suspect they ship the ones Americans have returned as unsatisfactory to their foreign customers, as they get returned, in the hope the foreigners won't pay premium shipping both ways for a replacement.
Every time I've sent something back and was willing to cover those costs, the replacements they've sent were virtually MINT. Coincidence? Perhaps not.
EDIT: As an aside, Beretta never made milled trigger bows. So if you insist on the milled variety, you will always get a mix-master assembly - probably mixed up by the Danes before the rifles were scrapped. If you order stamped, there is at least a chance you actually get an all-Beretta assembly, though the one I got sent was also a mix-master.