Which is cheaper, the Nivada Grenchen Chronomaster Broad Arrow or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

At MSRP the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition is the cheaper of the two at $1,150, against $2,085 for the Nivada Grenchen Chronomaster Broad Arrow — a $935 gap before any retailer discounting.

Which is bigger, the Nivada Grenchen Chronomaster Broad Arrow or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition wears larger at 39.5mm versus 38mm for the Nivada Grenchen Chronomaster Broad Arrow — a 1.5mm difference across the dial.

Which has better water resistance, the Nivada Grenchen Chronomaster Broad Arrow or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Nivada Grenchen Chronomaster Broad Arrow is rated to 100m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition.

Which has a longer power reserve, the Nivada Grenchen Chronomaster Broad Arrow or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition carries a 72-hour power reserve against 40 hours on the Nivada Grenchen Chronomaster Broad Arrow.

What movement does the Nivada Grenchen Chronomaster Broad Arrow run compared to the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Nivada Grenchen Chronomaster Broad Arrow runs a manual caliber (Landeron 70), while the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition runs a automatic (6R55).

Side by side

Nivada Grenchen Chronomaster Broad ArrowvsSeiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Nivada Grenchen Chronomaster Broad Arrow

86056M01LC

MSRP $2,085

Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

spb517j1

MSRP $1,150

At a glance

16 of 29 specs differ

Diameter

Chronomaster Broad Arrow38mm

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition39.5mm

Power Reserve

Chronomaster Broad Arrow40h

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition72h

Water Resistance

Chronomaster Broad Arrow100m

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition200m

MSRP

Chronomaster Broad Arrow$2,085

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition$1,150

Full specifications

Case

7 specs

Diameter

38mm

39.5mm

Thickness

14.55mm

12mm

Lug-to-Lug

46mm

44.5mm

Material

316L Stainless Steel

Stainless Steel

Finish

Brushed + Polished

Brushed and polished

Water Resistance

100m

200m

Caseback

Solid screw-down

Solid

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

5 specs

Caliber

Landeron 70

6R55

Type

Manual

Automatic

Power Reserve

40h

72h

Jewels

Complications

GMT, Chronograph

None

Pricing

1 specs

MSRP

$2,085

$1,150

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