Generic Italian lugs that any builder could buy and use. Agrati maybe? Anyway the list of brands it could be would be too long to type. Seatstay tops look like Bianchi, but other brands did that too.

Seatpost size is a clue to how thick the tubing is. If it's 27.2 mm then you have a thorobred, but it's probably thicker heavier tubing, which results in a smaller seatpost bore. Those cheap stamped dropouts usually didn't go with thin light tubing.

That generic replacement fork is a shame, and sometimes it means the original was bent in a crash. Which could mean the frame is bent too. Not always of course; there are other reasons why a fork might get replaced.