I see case diameter in description is 45 millimeters, but in overview section is 51.5mm. Which is correct ?

The 51.5mm measurement includes the sensor and crown, measured across from 9:00 to 3:00. Without crown, sensor, or buttons, it measures about 45mm (I don’t have calipers, but it’s pretty close to 45).

Help! i need to know the right size to put a nato strap on it. thanks!!

The original straps are 23mm wide. The lug width is 24mm. Hope that helps

Is the band's photoflorescence a coating, or infiltrated into the band itself. Will bleach damage it (swimming pool)?

It is infiltrated into the band itself. Soft rubber seems impermeable to tap water but don't know if it will be attacked by higher chlorine concentration of a swimming pool.

Casio Mens Pro Trek Solar Powered Silicone Watch Color Black

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Description

🕶️ Own the night with stealth tech and solar power — your ultimate outdoor companion.

NIGHT SAFARI STYLE - Stealthy black design with neon illumination and glow-in-the-dark band for ultimate nocturnal legibility.
SOLAR POWERED FREEDOM - Harness sunlight with Tough Solar technology—never worry about battery swaps again.
COMFORT MEETS DURABILITY - DURA-SOFT silicone band with movable lugs ensures a perfect fit and all-day comfort.
WATER RESISTANT RUGGEDNESS - 100m water resistance means this watch is ready for rain, rivers, and watersports without missing a beat.
ADVENTURE READY TRIPLE SENSOR - Altimeter, barometer, and digital compass keep you perfectly oriented on every trek.

The Casio PRO TREK PRG-650Y-1CR is a solar-powered, analog-digital watch engineered for night-time outdoor enthusiasts. Featuring a Triple Sensor system (altimeter, barometer, compass), neon illumination, and a luminescent silicone band, it offers superior readability in low light. Its durable resin and stainless steel case, combined with 100m water resistance and a comfortable DURA-SOFT band, make it a rugged yet stylish choice for professionals who demand both function and refined design.

Specifications

ASIN	B075YP2RCV
ASIN	B075YP2RCV
Additional Features	Shock Resistant
Age Range Description	Adult
Band Color	Black
Band Length	9.5 inches
Band Material Type	Silicone
Band Width	23 millimeters
Bands	1
Batteries	1 CR2 batteries required. (included)
Best Sellers Rank	#1,956,574 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7,908 in Men's Wrist Watches
Brand Name	Casio
Case Diameter	50 millimeters
Case Material Type	Resin
Case Thickness	12.2 millimeters
Clasp Type	Buckle
Closure Type	Buckle
Crystal	mineral
Customer Reviews	4.6 4.6 out of 5 stars (1,002)
Date First Available	October 9, 2017
Department	unisex-adult
Dial Color	Black
Display	Analog-Digital
Embellishment Feature	Crystal
Face Style	Linen
Global Trade Identification Number	00889232168708
Included Components	Wristwatches
Item Type Name	Watch
Item Weight	0.1 kg
Item model number	PRG-650Y-1
Manufacturer	Casio
Manufacturer	Casio
Manufacturer Part Number	PRG-650Y-1CR
Model Name	PRG-650Y-1
Model Number	PRG-650Y-1
Number of Items	1
Pattern	Solid
Power Source	Solar Powered
Product Dimensions	1 x 1 x 1 inches; 3.53 ounces
Series Number	650
Shape	Round
Sport Type	Walking
Strap Type	Silicone
Style Name	Digital
Theme	Outdoor Adventure
UPC	889232168708
Warranty Type	Manufacturer
Watch Movement Type	Quartz
Water Resistance Depth	328 feet
Water Resistance Level	Water Resistant

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Casio Men's 'PRO Trek' Solar Powered Silicone Watch, Color:Black (Model: PRG-650Y-1CR), Multi

Description

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