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suunto A10
> even if luminous for only a few hours after dark
Suunto A-30, but really you should get a basic headlamp instead
>preferably wrist mounted
absolutely useless gimmick, learn to proper land nav. Get pic related book for both yourself and your wife
With your $70 budget i would get
>$30 - Suunto A-30
>$30 - Cheap headlamp, they're really all the same so as long as you bring some spare AAA batteries you'll be fine.
>$10 - Be expert with map and compass book