The White Eagle cost me £550 (D762648), I was the purchaser on ebay!
The one I picked up for £50 was an Antoria 2376 (1773975), from your explanation of serial numbers dated to January 1977. A few dings, but nothing that detracts from it (one on front, one on back plus buckle rash).
Both with MIJ serial number plates. Yes, the Eagle has had a (very good) head repair.
Both seriously heavy, but then I also have a Gibson Les Paul Studio! 3 inch guitar straps help.
Quite a shock, as the first guitar I bought (new, as a student in 1974 for £30) was an Antoria 330/Casino copy! The LP was bought in 2007, the basses in 2017 and 2022.