but doesn't look to be a hole or anything that would impact the jacket

Solid Olive Green  Colour

it was replaced just a few years later with the now more renowned Vz 95 camouflage

some markings and some holes across the piece too as shown

The 2 top ones are often intended for ammunition and radios

British Royal Air Force No. 1 Dress Jacket - X Large Serbian but doesn't look to beAt a glance 100% Wool Body 2 Button Chest Pockets, 2 Flap Waist Pockets & 2 Internal Slit Pockets Button Closure Engraved Eagle "Staybrite" Buttons Fully Lined Classic Air Force Blue Colour RAF Service Dress Pit to Pit: 24" Suggested Size: X Large Slim Label recommends a chest of 119cm Sleeve Length: 23. 5" Short Label recommends a height of 181cm however the arms look to be shorter Collar to Hem: 33. 5" Vintage Militaria Issued 1979 1985 Genuine