This standard issue jacket was made with the intention of being one universal uniform

Another source suggests it was simply because the Romanian army wasn't able to standardise colouring in the various factories until a few years later

Korean War & World War 2

These have never seen issue and are just as ready to wear as they were in the 60's and 70's

West German Army Field Grey Long Sleeve Field Shirt Coverall This standard issue jacket wasAt a glance Durable Wool & Cotton Blend Material 2 Button Chest Pockets & 1 Internal Adjustable Sleeve Cuffs Shoulder Epaulettes Armpit Vents Long Sleeve German Flag Sleeve Patches Solid Field Grey Colour Becoming Scarce Chest Size: 38" Medium Slim Label states 90 95cm Sleeve Length: 23" Short Label states height of 170 180cm Collar to Hem: 28" Vintage Militaria Cold War Era 1960's Genuine West Germany Army Bundeswehr Surplus Grades Grade 2 Original