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

It appears the previous owner sewed on their on chest rank tag

designed for warm weather and tropical climates

Double Breasted

This shirt was designed for doing general purpose tasks in warm weather environments

British Army 1980 Pattern No. 2 Olive Green Dress Jacket - RLC - Medium 176/104 Cotton Another source suggests it wasAt a glance 100% Wool Material 2 Button Chest Pockets, 2 Flap Hip Pockets & Internal Pockets Button Closure Royal Logistics Corps Staybrite Buttons General Service Medal 1962 2007, HM The Queens Golden Jubilee Medal 2002 & Army Long Service and Good Conduct Medal Medal Ribbon Bar Signaller's Trade Patch Warrant Officer Class II Rank Patches Shoulder Epaulettes Classic Olive Green Colour Old Pattern No. 2 Uniform Chest Size: 40" Suggested Size: Medium