Seiko Presage Open Heart Zen Garden SARY175 / SSA413
5 Best Seiko Open Heart Watches [2022]
My Eastern Watch Collection: SEIKO 5 Sports 100M Retro Automatic Open Heart SSA327K1 (similar to SSA329K1, SSA331K1, SSA333K1 & SSA335K1) – A Flexible Watch, A Review (plus Video)