Seiko 5 Sports SRPH45 (SBSA147) BAIT Limited Edition “Astro Boy”

Seiko SRPH45 Review

Released in 2021 for the Japanese and American market, the Seiko SRPH45 is a dive watch limited to 2,000 pieces. This watch can also be found under the reference SBSA147.

It has a case width of 42.5 mm, a thickness of 13.4 mm, a lug-to-lug distance of 46 mm and a lug width of 22 mm.

The Seiko SRPH45 comes in a black stainless steel case with a black rotating bezel and a black bezel insert.

Featuring a black and gray matte dial with a black chapter ring, the Seiko SRPH45 has indices with no lume, and a set of black and white SKX-style hands with white lume.

Powered by the Seiko caliber 4R36 automatic movement, it features date and day complications.

The watch has a water resistance of 10 bar (100 meters) and comes on a black stainless steel oyster bracelet.

Seiko SRPH45 Full Specs

Release Year2021
MarketJapan, USA
SeriesBAIT Limited Edition
Limited Edition2,000 pieces, Yes
Case Width42.5 mm
Case Thickness13.4 mm
Lug-to-Lug46 mm
Lug Width22 mm
Case MaterialStainless steel
Case ColorBlack
Crown ColorBlack
Dial ColorBlack, Gray
Dial FinishMatte
Indices LumeNo
Hands TypeSKX-style
Hands ColorBlack, White
Hands LumeWhite
Bezel TypeRotating
Bezel Function12-hour
Bezel ColorBlack
Bezel Insert ColorBlack
Bezel Insert Markings ColorBlack
Rehaut / Chapter Ring TypeChapter ring
Rehaut / Chapter Ring ColorBlack
Movement Caliber4R36
Movement TypeAutomatic
Movement ComplicationDate, Day
Water Resistance10 bar
Band ColorBlack
Band MaterialStainless steel
Band TypeOyster bracelet