is this a tritium watch, which glows in the dark, or do you have to put the watch in direct light first before it shines at night?

Seiko does not make any tritium watches. The quality of the "glow paint" they use is good, but can not touch tritium in extended night (lack of light exposure) usage.

Does this watch have a sweep second hand, similar to most mechanical watches?

This watch has a 21,600 vph movement, the 7S36 (although some places list a 7S26c). It beats a bit slower than (and thus the sweep is slightly jerkier than) many of the midprice and higher automatics out there, which typically run at 28,800. It's sweepy, but the increments are more noticeable than on one of those watches.

Is the movement hacking? Does the second hand stop when the crown is pulled out?

The second hand doesn’t stop when the crown is pulled out

If the watch is stopped, how long of normal movement does it take to get it going? If the watch is fully wound, how long will it run standing still?

It doesn't take much movement to get it ticking again after its reset. With a full wind it gets me through the night. However, there's no way to know when it's fully wound and there was a couple times it stopped in the morning before I woke. It made me about a half hour late to work one morning so i don't wear it to bed anymore!

Seiko Mens Snzg15 Seiko 5 Automatic Stainless Steel Watch Nylon

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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$69203.97

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Description

⌚ Own Time, Own Style – The Seiko SNZG15 for the unstoppable you.

100 M WATER RESISTANCE - Swim, snorkel, and conquer your adventures without missing a beat.
AUTOMATIC SELF WIND MOVEMENT - No batteries, just pure kinetic energy powering your day.
BOLD 42 MM STAINLESS STEEL CASE - Striking presence on every wrist, built to last.
DURABLE NYLON STRAP WITH BUCKLE - Comfort meets rugged style for the modern professional on the move.
LUMINESCENT HANDS ARABIC NUMERALS - Effortless readability, even in low light or late-night meetings.

The Seiko Men's SNZG15 is a robust 42mm stainless steel automatic watch featuring a black analog dial with luminescent hands and Arabic numerals. It boasts a durable nylon strap with buckle closure and is water resistant up to 100 meters, making it perfect for swimming and snorkeling. Powered by Seiko’s reliable automatic self-wind movement, this timepiece blends sporty durability with timeless style, ideal for professionals who demand both function and flair.

Specifications

ASIN	B006I22GT2
ASIN	B006I22GT2
Additional Features	Glow In The Dark
Age Range Description	Adult
Band Color	Silver
Band Material Type	Nylon
Band Width	22 Millimeters
Bands	1
Batteries	1 A batteries required. (included)
Brand Name	SEIKO
Case Diameter	42 Millimeters
Case Material Type	Stainless Steel
Case Thickness	11 Millimeters
Clasp Type	Buckle
Closure Type	Buckle
Customer Reviews	4.4 4.4 out of 5 stars (698)
Date First Available	August 27, 2012
Department	Men
Dial Color	Black
Display	Analog
Embellishment Feature	Crystal
Face Style	Round
Global Trade Identification Number	00664689183647
Included Components	Nylon Band
Is Discontinued By Manufacturer	No
Item Weight	75 Grams
Item model number	SNZG15
Manufacturer	Seiko
Manufacturer	Seiko
Manufacturer Part Number	SNZG15
Model Name	SNZG15
Model Number	SNZG15
Package Dimensions	12.45 x 12.19 x 8.64 cm; 75 g
Pattern	Solid
Power Source	Automatic
Series Number	15
Shape	Round
Sport Type	Snorkeling, Swimming
Strap Type	Nylon Strap
Style Name	Sports
Theme	Sports
UPC	029665158611 664689183647
Watch Movement Type	Automatic
Water Resistance Depth	330 Feet
Water Resistance Level	Water Resistant

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