used mens' Hamilton Khaki Aviation X-Patrol Automatic Chronograph 41mm Swiss Watch on original rubber strap. 10 bar/145 psi Water resistant, caliber h21 ( a variation of the Valjoux 7750 movement with longer power reserve at 60 hours), sapphire crystal. Hamilton model H765560. Very good looking Hamilton watch. Hard to find! Good pre-owned working order. Minor scratches on bezel and clasp. 

Striking Hamilton X-Patrol with chronograph function, date, and a clever conversion ring where the tachy usually sits. Allows for quick conversion of imperial units (miles, gallons, feet, lbs) to metric.

FIXED USPS s/h with signature confirmed is $10 to confirmed Paypal US addresses. Good luck!