I think it would be fun to make a thread focusing on selective groupings from individual brands, emphasizing quality and variety instead of quantity. Feel free to interpret the three-watch collection concept creatively. 😀
I'll start with a 1960s Seiko trio: dress, dive, and chronograph.
[1964 Grand Seiko 43999, 1967 6217-8001 (aka 62MAS, first diver), and 1964 45899 Olympic monopusher, first chrono]