Which is bigger, the Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono or the Praesidus 42mm Automatic?

The Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono wears larger at 40mm versus 38mm for the Praesidus 42mm Automatic — a 2mm difference across the dial.

What movement does the Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono run compared to the Praesidus 42mm Automatic?

The Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono runs a manual caliber (H-51-Si), while the Praesidus 42mm Automatic runs a automatic (Seiko NH35).

Side by side

Hamilton Khaki Aviation Pilot Pioneer Mechanical ChronovsPraesidus 42mm Automatic

Q: Which is cheaper, the Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono or the Praesidus 42mm Automatic?

At MSRP the Praesidus 42mm Automatic is the cheaper of the two at $680, against $2,445 for the Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono — a $1,765 gap before any retailer discounting.

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

Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono

h76409140

MSRP $2,445

Praesidus 42mm Automatic

P-42-HP-GRSG

MSRP $680

At a glance

11 of 29 specs differ

Diameter

Khaki Aviation Pilot Pioneer Mechanical Chrono40mm

42mm Automatic38mm

Power Reserve

Khaki Aviation Pilot Pioneer Mechanical Chrono60h

42mm Automatic40h

Water Resistance

Khaki Aviation Pilot Pioneer Mechanical Chrono100m

42mm Automatic100m

MSRP

Khaki Aviation Pilot Pioneer Mechanical Chrono$2,445

42mm Automatic$680

Full specifications

Case

6 specs

Crystal & Dial

1 specs

Dial Color

Blue

42mm Automatic

Movement

3 specs

Caliber

H-51-Si

Seiko NH35

Type

Manual

Automatic

Power Reserve

60h

40h

Pricing

1 specs

MSRP

$2,445

$680

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