Hypoallergenic · Nickel-free · Sized for young wearers Flat-rate $15 U.S. shipping · 7–12 business days Every piece arrives in a keepsake gift box — complimentary
Baby Miss You
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001
Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001

Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER Ref# 210.30.42.20.01.001

$369.00

Hypoallergenic Nickel-free Keepsake boxed
Flat-rate $15 U.S. shipping Ships in a velvet keepsake box Free returns within 30 days of delivery Arrives Sep 14 – Sep 23

Unworn Seamaster DIVER 300M CO‑AXIAL MASTER CHRONOMETER 210.30.42.20.01.001. 42 mm, Black dial, Steel case, Ceramic bezel, 8800 calibre, Self Winding Movement, 55 hours power reserve, Steel bracelet with Foldover clasp. Water resistant to 300 m.

TECHNICAL DETAILS

  • Model: Seamaster
  • Reference: 210.30.42.20.01.001
  • Diameter: 42 mm
  • Case material: Steel
  • Dial color: Black
  • Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
  • Bezel Type: Unidirectional rotating bezel
  • Bezel Color: Black
  • Bezel Material: Ceramic
  • Calibre: 8800
  • Movement: Self Winding
  • Power Reserve: 55 hours
  • Bracelet Material: Steel
  • Buckle type: Foldover clasp
  • Functions: Anti‑magnetic, Chronometer, Date, Helium escape valve, Master Chronometer Certified, Screw‑in crown, Unidirectional rotating bezel, Transparent case back
  • Water resistance: 300 m
HypoallergenicNickel-free and lead-free, gentle on sensitive skin
Style no.OP-122976
Baby (0–24 mo)Bracelets 4.0–4.7 in · Necklaces 10–12 in · Earrings 8–11 mm hoops
Child (2–12 yr)Bracelets 4.7–6.0 in · Necklaces 12–14 in · Rings sizes 2–4
TeenBracelets 6.0–6.5 in · Necklaces 14–16 in · Rings sizes 4–7

Between sizes? We recommend sizing up — a little room to grow keeps a keepsake wearable longer.

U.S. shipping is a flat $15 per order. Every order ships from our fulfillment warehouse in Hong Kong — prepared within 1–3 business days, then delivered in 7–12 business days with tracking — estimated delivery Sep 14 – Sep 23.

Unused and unworn items may be returned within 30 days of delivery. We provide a prepaid U.S. return label and charge no restocking fee. See our Returns & Refunds policy for the earrings hygiene exception and instructions.

keep the set together

Completes the keepsake

Keep the little moments

Join us for new keepsakes, milestone guides and 10% off your first order.

$15 flat-rate U.S. shipping — tracked door to door, 7–12 business days. Free 30-day U.S. returns — prepaid label and no restocking fee. Hypoallergenic promise — nickel-free 14K gold & sterling silver.