Military time features prominently on the dial of the Khaki Field King Auto, underlining the military heritage of this handsome Hamilton. Specially designed protectors ensure the safety of the crown at all times. Long live the king.
With an extended power reserve of up to 80 hours, the H-40 is both beautiful and bold. Almost double than market standard, 80 hours power reserve means you can remove your watch on Friday and it will still be ticking on Monday.
We offer free delivery for all orders. If you would like your order to arrive sooner you can select “Next-Day Delivery” (rates vary by location). To find out more information about our delivery options please visit our Shipping Policy.
Return
We offer returns within 14 days from delivery. For more information, please visit our Return Policy.
If you have an item that you would like to return, please contact our customer service department at 1-800-234-8463 or Write us.
Features
SELF-WINDING
Wrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.
STAINLESS STEEL CASE
A highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.
Sapphire Crystal
Synthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.
WATER RESISTANCE
Your timepiece is resistant up to 5 bar (50m) / 73 psi (164 ft).
KHAKI FIELD
From the original soldier's watch to rugged and robust new models designed for life's adventurers, the Khaki Field collection was inspired by military and built to last.
4.8/5
Overall rating | 17 reviews
Love it. Haven’t worn another watch since it arrived. Lume is a little weak.
anonymous anonymous.
May 12, 2026
I love my Hamilton Khaki Field King Auto. I had a tough time choosing from all the other incredible designs and features of the other watches but I knew this was the one for me. It's styled so professionally and matter of factly. It's just cool. On a bracelet or leather or NATO band, its versatile and tough. It's one of my absolute favorite watches.
David P.
March 24, 2026
the look and functionality are great for an every day work watch
Carlos G.
May 5, 2025
Beautiful watch. Everything I expected I really enjoy the product and would recommend it to anyone looking to purchase a quality watch.
anonymous a.
June 7, 2024
Just simply a beautiful watch!!
anonymous a.
May 29, 2024
Wedding gift, I was tempted to keep for myself. He loves it, robust and handsome watch.
anonymous a.
September 19, 2023
Beautiful time piece. It has all the functions I need and none that I don't need.
anonymous a.
June 13, 2023
Quality is 10/10, the movement is beautiful the size of the time piece and face are perfect and make for the perfect gift to my boyfriend!
anonymous a.
April 16, 2022
It's a beautiful, elegant, hardy watch. I love it.
