Which is cheaper, the Nivada Grenchen F77 MK2 38mm Automatic or the Hemel Sky Racer Mechanical?

At MSRP the Hemel Sky Racer Mechanical is the cheaper of the two at $550, against $1,360 for the Nivada Grenchen F77 MK2 38mm Automatic — a $810 gap before any retailer discounting.

Which is bigger, the Nivada Grenchen F77 MK2 38mm Automatic or the Hemel Sky Racer Mechanical?

The Hemel Sky Racer Mechanical wears larger at 43mm versus 38mm for the Nivada Grenchen F77 MK2 38mm Automatic — a 5mm difference across the dial.

Which has better water resistance, the Nivada Grenchen F77 MK2 38mm Automatic or the Hemel Sky Racer Mechanical?

The Nivada Grenchen F77 MK2 38mm Automatic is rated to 100m versus 50m for the Hemel Sky Racer Mechanical.

Which has a longer power reserve, the Nivada Grenchen F77 MK2 38mm Automatic or the Hemel Sky Racer Mechanical?

The Hemel Sky Racer Mechanical carries a 40-hour power reserve against 38 hours on the Nivada Grenchen F77 MK2 38mm Automatic.

What movement does the Nivada Grenchen F77 MK2 38mm Automatic run compared to the Hemel Sky Racer Mechanical?

The Nivada Grenchen F77 MK2 38mm Automatic runs a automatic caliber (Soprod M100), while the Hemel Sky Racer Mechanical runs a manual (Seagull ST19).

Side by side

Nivada Grenchen F77 MK2 38mm AutomaticvsHemel Sky Racer Mechanical

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

Nivada Grenchen F77 MK2 38mm Automatic

F77 MK2 38mm

MSRP $1,360

Hemel Sky Racer Mechanical

HF37MNB

MSRP $550

At a glance

16 of 29 specs differ

Diameter

F77 MK2 38mm Automatic38mm

Sky Racer Mechanical43mm

Power Reserve

F77 MK2 38mm Automatic38h

Sky Racer Mechanical40h

Water Resistance

F77 MK2 38mm Automatic100m

Sky Racer Mechanical50m

MSRP

F77 MK2 38mm Automatic$1,360

Sky Racer Mechanical$550

Full specifications

Case

7 specs

Diameter

38mm

43mm

Thickness

12.2mm

14mm

Lug-to-Lug

46.2mm

49mm

Lug Width

22mm

20mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

100m

50m

Caseback

316L Steel Caseback

Solid

Crystal & Dial

4 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Underside

Inner

Dial Color

Black Gem Onyx Dial, Super Lum. White Dots, Shiny Gold Applied Indexes, Applied Logo Gold color

Black

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

Soprod M100

Seagull ST19

Type

Automatic

Manual

Beat Rate

28 vph

28,800 vph

Power Reserve

38h

40h

Pricing

1 specs

MSRP

$1,360

$550

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