I cannot say much other than it was from some old stock (and that PHIHONG TECHNOLOGY CO. is well known manufacturer):
EDIT: Google actually bought TC G1000 from Phihong (for their Pixel smartphones) and when I get more time I might make some review of this power supply charging Librem 5 (if any interest available). This is indeed one of the best and most reliable PD power supplies for charging of the Librem 5 (up to my own expectations/approach 
).
