Honestly, none from a distance. Have identified so many watches incorrectly I try not to bother unless I'm closer and can strike up a conversation. I'd like to think I could safely spot a panerai but I bet it would turn out to be a Daniel Wellington knowing my record.
Most common Watch I see on men nowadays and can identify immediately is
Ha! People still wear these?!? I worked for a largish skateboard shop chain here in Southern CA and in the late 2000s to mid 2010s we would sell these like hot cakes. Big wrist, small wrist, didn’t matter we couldn’t keep enough of them in the display case. A 51mm case diameter, and if I remember correctly, something like 15mm to 20mm thick, even for a big wristed individual I never saw the appeal. I had no idea they were still popular.
I used to own a ‘70s vintage Rolex Daytona Cosmograph. At an NAWCC banquet 30 years ago, I had a guy 50 feet away, recognize the watch. He hunted me down later to ask if the watch was for sale! 🤨
Seiko Astron (the early, 47mm models). Seiko Turtles (all 5,000 references look the same to me at a distance), and I would have said the sparkle of Grand Seiko’s, but I mis-identified a Zenith as a Grand Seiko recently (they are shinny as well).