does it work on battery or it's mechanical???

HiThis watch is powered by a Japanese Miyota mechanical automatic movement, the watch is protected by a 2 years manufacturer warranty plus one additional year offered by our company.Should you have more questions please don't hesitate to contact us.All the best,Victor CañeteJustwatchme-net team 416 419-6039

Es original, hay uno de 39 mm?.

This is 100% authentic and original but it is 42mm size.

Is it ok wearing this watch in shower?

I wouldn't. At 5atm/ 50m of water resistance this is good enough to wear while washing your hands but not shower. Remember, this is a flight watch, not a diver ;)

ASIN	B004FEEVQQ
Batteries	1 Product Specific batteries required. (included)
Best Sellers Rank	#1,226,697 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #5,624 in Men's Wrist Watches
Customer Reviews	4.6 4.6 out of 5 stars (139)
Date First Available	July 23, 2011
Department	Mens
Is Discontinued By Manufacturer	No
Item model number	Aachen 42
Manufacturer	Laco
Package Dimensions	11.65 x 4.25 x 2.05 inches; 14.11 ounces

Gents Pilot Watch Aachen 42, Black/Brown, 42mm, Strap

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