$150 Seiko 5 Watches Are an Affordable Alternative to Rolex, manyofmany.com pronounces, pimping the new Seiko 5 in hopes of a commission. Yes, well, as good as the wee beastie may be, it’s an affordable alternative to the virtually identical Seiko Prospex, not a Rolex Submariner. But there are watches that scratch that particular itch . . .