from individual brands, emphasizing quality and variety instead of quantity.
As there was no specification that they be owned by the contributor:
When I think of a single brand that in 3 watches could provide the most depth of quality and variety, my mind goes to JLC. The (realistic) 3-watch collection I’d put together from JLC
a gold 3-hand dress watch, a capable diver/sports, an alarm (that will even work under water), and a world-timer/GMT (with one of the best multi-time information presentations ever made)
Though, another significant perk of my JLC collection limited to exactly “3” watches: still yet a fourth watch, with a second GMT presentation: