Seiko Prospex SPB429J Whitsundays Limited Edition Sumo
Want a Sumo coloured for the Whitsundays? The SPB429J (also sold as SPB429J1) is an Australasian exclusive limited to 1,000 pieces. Gradient blue-green dial, 45 mm stainless case, Caliber 6R35 with about 70 hours of reserve, sapphire, 200 m diver’s water resistance, screw-down crown, unidirectional bezel.
Seiko’s Sumo case is a large, cushioned 45 mm diver with a 20 mm lug width. Thickness is about 12.9 mm; lug-to-lug is about 52.6 mm. The 6R35 improved reserve over the older 6R15. The package typically includes the steel bracelet plus extra silicone straps so you can switch for heat and salt water. The case back is numbered out of 1,000.
Why this Sumo is a collector diver
One thousand pieces for Australia and New Zealand. The colourway is the point: tropical water over a Sumo layout, not a black workhorse SKX. 200 m, sapphire, and a solid end-link bracelet keep it a real diver. Chronospride inspects authentic stock before dispatch.
- Movement: Seiko 6R35 automatic, manual wind, about 70 hours, 24 jewels
- Case: 45 mm diameter, about 12.9 mm thick, about 52.6 mm lug-to-lug, 20 mm lugs
- Crystal: sapphire
- Water resistance: 200 metres, screw-down crown, screw case back
- Bezel: unidirectional elapsed-time
- Limited edition: 1,000, Australasian exclusive
- Bracelet: stainless steel; extra silicone straps commonly included
Frequently asked questions
Is SPB429J the same as SPB429J1?
Yes. SPB429J is the Australasian boutique code; SPB429J1 is the same Whitsundays Sumo reference used on export paperwork. Chronospride lists it as SKU SPB429J.
How many Whitsundays Sumos were made?
1,000 pieces, exclusive to Australia and New Zealand, with the serial on the case back.
What movement is in the SPB429J?
Caliber 6R35: automatic with manual winding, about 70 hours of reserve, 24 jewels, +25 to −15 seconds per day (Seiko spec).
What size is the Whitsundays Sumo?
45 mm diameter, about 12.9 mm thick, about 52.6 mm lug-to-lug, 20 mm lug width. It wears large.
Is it a 200 metre diver?
Yes. Screw-down crown, screw case back, unidirectional bezel, 200 m water resistance.
Where can I buy the SPB429J in Australia?
Chronospride lists authentic stock, inspected before dispatch, with free shipping Australia-wide on eligible orders.
Pick the SPB429J if you want a numbered Australasian Sumo with tropical colour—not a 38 mm Seiko 5 sports watch.
Buying this watch in Australia
Chronospride lists authentic stock and inspects each watch before dispatch. Eligible orders ship free Australia-wide. Covered by Chronospride’s 12 months warranty, handled by our team. Read the authenticity and warranty terms before you buy. If you need a different strap width or case size, use the specs above and our shop-by-size filters rather than guessing from photos alone.
Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.
| Case-Size | 45mm |
|---|---|
| Band-Width | 20mm |
| Lug-Width | 20mm |
| Lug to lug size | 52.6mm |
| Case Thickness | 12.9mm |