Steeldive SD1971
A homage of the Seiko Sumo
Price not listed yet
- Size
- 44.9 mm across, 0.1 mm narrower than the Seiko
- Movement
- NH35, automatic
- Look
- Not compared mark by mark yet
- Gives it away
- 0.1 mm narrower than the Seiko, 44.9 mm against 45 mm
Compare with another homage
No shop links yet.
Homages of the Seiko Sumo you can buy
Against the Seiko
45Seiko Sumo SPB101J144.9Steeldive SD1971Photos use listed case widths and automatic case-edge readings. The readings have not been manually audited. Photo proportions stay unchanged. Perspective and lug length can differ.
Seiko Sumo SPB101J1 photo: SPB101J1. Steeldive SD1971 photo: SD1971 Sumo style, black dial, steel bracelet.
The Seiko drawn is the SPB101J1.
What gives it away
- 0.1 mm narrower than the Seiko, 44.9 mm against 45 mm
Rotating dive bezel
Not compared yet.
Triangle at 12
Not compared yet.
Round hour plots
Not compared yet.
Date at 3
Not compared yet.
Crown at 4
Not compared yet.
Broad lumed hands
Not compared yet.
Seiko left, SD1971 right.
Everything else
Every spec5 listed, each with where it came from
Every spec we have
From sellers. Each figure links to where it was found.
- Case width
- 44.9 mmsteeldive.com, 2 Oct
- Thickness
- 14.7 mmsteeldive.com, 2 Oct
- Lug width
- 20 mmsteeldive.com, 2 Oct
- Movement calibre
- NH35steeldive.com, 2 Oct
- Water resistance
- 200 msteeldive.com, 2 Oct
The movementTime Module NH35, in plain words
The movement, in plain words
Steeldive lists the NH35 for the SD1971.
How it runs. An automatic. Wearing it winds it.
Beat. It beats 21,600 times an hour, 6 a second, so the seconds hand sweeps in small steps.
Setting the time. The seconds hand stops when you pull the crown out, so you can set it to the second.
On your wrist44.9 mm across, 14.7 mm thick, on a wrist your size
How it sits on your wrist
Set your wrist circumference to compare the 44.9 mm case with a schematic wrist. The ellipse estimates wrist width and shape. It cannot predict your fit.
17.0 cm6.7 in around
This wrist model is about 56 mm across. The case spans 80% of that estimated width. Lug to lug is unknown, so no lug extent is drawn.
Wrap a strip of paper round your wrist just below the bone, mark where it meets and measure it.
How tall it stands
The side view uses listed dimensions. Case shape and lug curve are schematic.
Lug to lug is not listed yet, so the drawing stops at the case.
More from Steeldive4 more on Bewrist
Beside other Seiko Sumo homagesThis watch and 1 more of its look, to scale
- Steeldive SD1971
This watch
44.9 mm
- Addiesdive MY-H10
about £104 $139, seen 2 Oct44.5 mm
Drawn to scale by listed case width.
SourcesThe page this record was built from
- STEELDIVE SD1971 product pagesteeldive.com, 2 Oct