Since I don't think I'll spend the exorbitant money to own all four (five technically) of the 2019 GS Four Seasons releases, I came up with my own: my own:
Spring: King Seiko Lavender Special Edition (SPB291)
Summer: GS Four Seasons Rikka / Summer (SBGH271)
Autumn: King Seiko Modern Re-Interpretation Burgundy (SPB287)
Winter: Omega Good Planet Aqua Terra Titanium
Spring v2: GS Four Seasons Shunbun / Spring (SBGA413)
Personally I think my pick for spring is more accurate than GS's, Cherry Blossoms aside. :) I also picked up a few of these straps for use with my two GS's: https://delugs.com/blogs/strap-guide/strap-guide-grand-seiko-sbga413-shunbun
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Love the pairing of the strap for spring V2