Side by side

Resco RTAC GMT - DLCvsSeiko Astron

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

RTAC GMT - DLC
RescoRTAC GMT - DLC
MSRP $1,205
Astron
SeikoAstron
MSRP $2,700
What people say

Owners + reviewers, side by side

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

Resco RTAC GMT - DLC

Owners widely praise the Resco RTAC GMT - DLC for its quality, durability, and robust build, fitting well with an outdoorsy lifestyle. The watch features red accents on the seconds and GMT hands, an internal dive bezel, and double screw-down crowns. One owner inquired about the canvas strap's fit for smaller wrists. On balance, owners rate the Resco RTAC GMT - DLC highly for its ruggedness and quality suitable for all activities.

Seiko Astron

The Seiko Astron is widely praised for its advanced timekeeping technology, including GPS and radio wave synchronization, offering grab-and-go convenience and exceptional accuracy, with some users reporting +/- 15 seconds per month or even 1/2 second per day for its autonomous quartz movement. Owners appreciate its well-finished titanium cases and bracelets, detailed dials with high-contrast markers, and lightweight, comfortable wearability. However, some find the price point of around $2,000 to $2,400 expensive, noting that GPS sync works best outdoors and that certain models lack screw-down casebacks, impacting water resistance. The lume is described as sparse on some models, and recessed buttons require tools to operate. Overall, owners and reviewers rate the Seiko Astron highly for its cutting-edge technology and comfortable, well-finished design, with the value proposition becoming more compelling when models are found at a discount.

From video reviewers

The watch's automatic time zone adjustment via GPS is a notable feature. The watch's solar-powered charging system can take up to 6 months to fully charge, which may not be ideal for users who need a quick power boost.

At a glance

14 of 29 specs differ
Diameter
RTAC GMT - DLC44mm
Astron43.3mm
Power Reserve
RTAC GMT - DLC40h
Astron40h
Water Resistance
RTAC GMT - DLC200m
Astron100m
MSRP
RTAC GMT - DLC$1,205
Astron$2,700

Full specifications

Case

7 specs
Category
Chronograph
Diameter
44mm
43.3mm
Thickness
13mm
13.4mm
Lug-to-Lug
51.5mm
49.5mm
Lug Width
22mm
14mm
Material
Stainless Steel
Titanium
Water Resistance
200m
100m

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Super-clear coating
Dial Color
Blue
Black
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
5X83
Jewels
25
14

Pricing

1 specs
MSRP
$1,205
$2,700
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