Seiko is the best, my all time favourite watch, design simple, super accurate to the second, high technology too.
I have no idea about Seiko 5 so I googled now I understand -
https://www.hodinkee.com/articles/the-new-seiko-5-sports-watches
"Seiko has always created watches around specific sets of clearly defined principles. The delineation of the product line offers clarity to buyers – for every purpose, there's a watch. Often times the nomenclature of the watch would hint at its intended use. In 1963, the Seiko 5 line was introduced. The watches were geared towards younger buyers who wanted value and style – and Seiko 5 caught on in a big way. There were 5 traits every Seiko 5 had: an automatic movement, a day/date window, significant water resistance for sporting activities, a crown at 4 o'clock, and durable case and bracelet(or strap). Many of these standards almost seem obvious (except maybe the crown at 4), but that's because watches like the Seiko 5 have contributed to these ideals becoming benchmarks. Seiko managed to produce a watch that met all the above criteria for a price that was agreeable to younger folks. The Seiko 5 watches were designed with purpose and accessibility in mind; the communication materials and strategy appealed directly to an audience that needed a watch like the Seiko 5: the youth of the '60s."