Oil WaxHigh quality waxed calfskin. Vegetable tanned. Getting a great patina. Highest quality calfskin. This strap was made using cuts of vintage leather, usually used to make hunting jackets typical of the 1950s 60s, by many famous brands. The final finish of the leather involves a wax treatment that makes the leather waterproof and gives it the typical and unmistakable ochre color. Perfect to match all military watches or to give a sportier look to your