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The Verdict

The Casio MTP-S120L-3AVCF is a maintenance-free field watch built for those who value utility over jewelry. Its primary strength is the solar-powered movement, which eliminates the hassle of battery changes and provides years of reliable timekeeping. Users frequently praise the rugged aesthetic and the 100-meter water resistance, making it capable of handling everything from office duty to weekend hiking. The day/date display and 24-hour military markings add practical depth to a very readable dial.

Value vs. Trade-off
The trade-offs are typical for this price bracket: the lume is functional but fades quickly, and the stock cloth strap is notoriously stiff during the initial break-in period. Additionally, the mineral glass crystal is durable but lacks the scratch resistance of high-end sapphire.

However, when you weigh these minor gripes against the price, the value proposition is undeniable. You are getting a stainless steel, solar-powered tool watch from a legendary brand for a fraction of what you'd pay for a mechanical alternative. For anyone seeking a reliable, set-and-forget daily driver that looks better with age, this watch remains a standout buy.

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Rating
ColorGreenBlack—————
MovementSolar (Light Powered)Solar (Light Powered)Solar (Light Powered)Quartz (Battery Powered)Quartz (Battery Powered)Quartz (Battery Powered)Solar (Light Powered)
Display TypeAnalog (Hands)Analog (Hands)Analog (Hands)Analog (Hands)Analog (Hands)Analog (Hands)Analog-Digital (Both)
BrandCasioCasioCitizenCasioCasioCasioCasio
Band MaterialNylonNylonNylonLeatherLeatherStainless SteelNylon
FeaturesDay-Date DisplayDay-Date DisplayDate DisplayDay-Date Display—Date Display, Luminous Hands & MarkersLuminous Hands & Markers, Date Display
Dial ColorBlackBlackBlackBlackBlackBlackGreen, Black
GenderMensMensMensMensMensMensMens
StyleCasualCasualCasualCasualCasualCasualCasual
Water ResistanceSwimming (50M - 100M)Swimming (50M - 100M)Swimming (50M - 100M)Swimming (50M - 100M)Swimming (50M - 100M)Swimming (50M - 100M)Swimming (50M - 100M)

About this product

  • SOLAR POWERED — NO BATTERY SWAPS, EVER — Casio's solar-recharging system converts even faint light from fluorescent lamps into ample energy to achieve stable operation of various high-load functions — meaning the MTP-S120L stays powered through normal indoor and outdoor use indefinitely. Operating time from a full charge runs approximately 8 months without any additional light exposure, making it one of the most maintenance-free everyday analog watches available.
  • STAINLESS STEEL CASE WITH MILITARY-INSPIRED NYLON STRAP — The 42mm stainless steel case features a solid caseback and fixed bezel, paired with a 22mm nylon NATO-style strap with a buckle closure. The fabric band has a backing just like a proper military strap — a purposeful, field-watch aesthetic that pairs naturally with the black or olive colorways and fits the 22mm lug width for easy strap swaps.
  • DAY & DATE DISPLAY | 24-HOUR INNER BEZEL | LUMINOUS HANDS — The black dial features hour, minute, and second hands, a day and date display, and a 24-hour inner chapter ring. Luminous hands ensure readability in low-light conditions — a practical field-watch detail that keeps the time visible after dark without a backlight. Mineral glass protects the dial from everyday scratches.
  • 100M WATER RESISTANT | SCREW-ON CASEBACK | 42MM STAINLESS STEEL — Water resistant to 100 meters (10 ATM), with a stainless steel case measuring 42mm in diameter. The caseback is screw-on, providing additional movement protection — a construction detail typically found on watches at a significantly higher price point. Push-in crown completes the clean, purposeful profile.
  • FIELD-WATCH VERSATILITY — NATO STRAP-READY & EVERYDAY CAPABLE — The MTP-S120L is great for a grab-and-go everyday watch — stainless steel case, solar powered, day/date, and thin enough where a NATO strap doesn't make it look too thick on the wrist. Available in Black (MTP-S120L-1AV) and Green (MTP-S120L-3AV) colorways — both built on the same proven solar platform.

Specifications

Brand
Casio
Model
MTPS120L-3AV
Gender
Mens
Brand
Casio
Style
Casual
Display
Analog (Hands)
Band
Nylon
Features
Day-Date Display
Water Resistance
Swimming (50M - 100M)
Dial Color
Black
Movement
Solar (Light Powered)
Case Diameter
42 mm
Width
4.17 inches
Height
3.35 inches
Depth
7.64 inches
Weight
0.32628414776 pounds
Colour
Green
Released
2020-09-22T00:00:01Z
Part number
MTP-S120L-3AVCF
Manufacturer
Casio
GTIN
00889232224909