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SPB503

Seiko

SPB503 Mechanical

Also sold as SPB503J1Japan

In production All SPB references →
Caliber
6R55
Case diameter
39.5mm
Water resistance
200 m
Power reserve
72h

Best price USD 945.00 eBay · 13 offers · checked 1 day ago

Seiko SPB503: caliber 6R55, 39.5 mm case, 200 m water resistance. 13 offers from USD 945.00.

Where to buy Last seen when we checked; prices change

13 offers from USD 945.00

Source Total
eBay from US · 1 day ago arrives in 3–7 days New · USD 945.00 · Free Best price USD 945.00 View offer
eBay from US · 12 hours ago arrives in 2–6 days New · USD 945.25 · Free USD 945.25 View offer
eBay from US · 12 hours ago arrives in 5–12 days New · USD 949.99 · Free USD 949.99 View offer
eBay from US · 12 hours ago arrives in 2–5 days New · USD 959.00 · Free USD 959.00 View offer
eBay from US · 2 weeks ago New · USD 969.49 · Free USD 969.49 View offer
eBay from IT · 12 hours ago arrives in 13–26 days New · ≈ USD 958.52 · ≈ USD 28.53 ≈ USD 987.05 EUR 865.00 View offer
eBay from US · 2 weeks ago New · USD 995.00 · Free USD 995.00 View offer
eBay from US · 2 days ago New · USD 995.00 · Free USD 995.00 View offer
eBay from US · 12 hours ago arrives in 2–5 days New · USD 995.00 · Free USD 995.00 View offer
eBay from US · 12 hours ago arrives in 3–7 days New · USD 995.00 · Free USD 995.00 View offer

Total shown does not include import duties or taxes — the marketplace did not report them for these listings. Cross-border orders may be charged on delivery.

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Specifications

Specifications from Seiko, last seen 2026-09-21.

Movement

Caliber
6R55 All 6R55 watches →
Movement
Automatic
Power reserve
72h
Jewels
24

Case & crystal

Case material
Stainless steel (super hard coating)
Case diameter
39.5mm
Case thickness
12.7mm
Lug to lug
46.4mm
Lug width
20mm
Crystal
Sapphire crystal with magnifier

Resistance

Water resistance
200 m
Magnetic resistance
4,800 A/m

Catalogue

Family
SPB
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Variants Same watch, different market or bracelet

Reference Edition Region Band Clasp Weight
SPB503J1 J1 Japan Three-fold clasp with push button release 147g

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