Casio GMA-P2100vsCasio LCW-M170TD

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Casio GMA-P2100 at true scale

GMA-P2100

Casio LCW-M170TD at true scale

LCW-M170TD

Diameter

40.2mm

39.5mm

Lug-to-Lug

46mm

lowest

46.4mm

Thickness

11.2mm

9.2mm

lowest

Water Resistance

200m

highest

50m

MSRP

$110

lowest

$229

Movement

Quartz

Solar

Case

7 specs
Diameter
40.2mm
39.5mm
Thickness
11.2mm
9.2mm
Lug-to-Lug
46mm
46.4mm
Lug Width
n/a
n/a
Material
Resin / Bio-based resin
Titanium
Finish
n/a
n/a
Water Resistance
200m
50m

Crystal & Dial

2 specs
Crystal
Mineral
Sapphire crystal with anti-reflective coating
AR Coating
No
n/a

Movement

3 specs
Type
Quartz
Solar
Power Reserve
n/a
Approx. 4 months on rechargeable battery; 22 months with power-save in darknessh
Complications
None
Radio-controlled (MULTI BAND 6), World Time (29 time zones + UTC), 1/100s Stopwatch, Countdown Timer, 5 daily alarms, Full auto-calendar (to 2099)

Pricing

1 specs
MSRP
$110
$229
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Reviews

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

Casio GMA-P2100

Owners widely praise the Casio GMA-P2100 for its compact size, with one user noting it fits their wrist when other G-Shocks do not. The watch is described as having a smart look and keeping time with near perfection. One owner finds the GMA-P2100 a suitable size despite considering larger models, and another humorously suggests "P" in the model name might stand for "Pico" due to its small stature. On balance, owners rate the Casio GMA-P2100 highly for its wearability and reliable timekeeping.

From video reviewers

The watch is praised for its 200m water resistance and slimmer, sleeker design compared to traditional G-Shocks. Reviewers noted the integrated calculator function. No shared weaknesses were identified.

Casio LCW-M170TD

Owners praise the Casio LCW-M170TD for its solar-powered, radio-controlled movement, titanium case, and sapphire crystal, noting perfect second hand alignment and an elegant, dressy appearance compared to other models. Some find the lume weak and the 6 o'clock marker out of place, while others criticize the LCD background and the four-screw case back. On balance, owners rate the Casio LCW-M170TD highly for its advanced features and refined titanium construction at its price point.