Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsPraesidus Service Watch

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

Flyboy Airmaster GMT Automatic
AVI-8Flyboy Airmaster GMT Automatic
MSRP $365
Service Watch
PraesidusService Watch
MSRP $259

At a glance

7 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Service Watch42mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Service Watch40h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Service Watch100m
MSRP
Flyboy Airmaster GMT Automatic$365
Service Watch$259

Full specifications

Case

4 specs
Category
GMT
Field
Diameter
40mm
42mm
Lug Width
20mm
Water Resistance
50m
100m

Crystal & Dial

1 specs
Dial Color
Black
Green

Movement

1 specs
Caliber
NH34
Seiko NH35

Pricing

1 specs
MSRP
$365
$259

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

AVI-8 Flyboy Airmaster GMT Automatic

Owners widely praise the AVI-8 Flyboy Airmaster GMT Automatic for its robust build quality, intricate three-timezone function, and crisp dial texture. The watch is noted for its wearable 41mm case size and 48.5mm lug-to-lug, with an internally positioned GMT complication that maintains a clean dial appearance. Some owners report the stock leather strap feels cheap and limits strap changing options. On balance, owners rate the AVI-8 Flyboy Airmaster GMT Automatic highly for its solid finishing and value, particularly highlighting the dial's depth and texture.

Praesidus Service Watch

Owners widely praise the Praesidus Service Watch for its 38mm size and solid build quality, with the domed crystal providing vintage distortion and the unbranded dial appealing to history enthusiasts. However, owners report jumpy hand sensitivity when setting the time. One owner experienced a scratchy crown and a noisy rotor on their DD-45, which persisted after warranty service and eventually led to the crown locking mid-way. Concerns about slow customer service and a negative reputation for Praesidus's support are also noted by owners. On balance, owners appreciate the vintage aesthetic and wearability of the Praesidus Service Watch, though persistent customer service issues temper enthusiasm.

From video reviewers

The 38mm case size is a strength for those preferring smaller watches. The dial may show slight discoloration or unevenness in finish.

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