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Not sure I’d call it small at 42mm but a durable everyday watch it definitely is. Have a friend who was bought one as his first and only mechanical watch and he absolutely loves it.
This one’s 36mm, bracelet is from Seiko’s “straight in the bin” range but the watch itself looks good I think:
https://www.citywatches.co.uk/product/seiko-5-automatic-21-jewel-snk809k1-snk809k-mens-watch/
At that level they’re almost certainly all made in the same factory (and not in Japan). The K1/J1 etc is just badging / labelling / designation for different markets.