Marking on the inside by the previous owner

The previous owner has removed their cap's side buttons and chin strap

Waist Size: 34" | Suggested Size: Medium Slim - Label reads "MEDIUM - X SHORT"

Chest Size: 44" | Suggested Size Medium Regular - Label is missing

Vintage Militaria / Dated 1970 / M51 Uniform Series

British Army Thermal Buffalo Jacket - Medium Gas Mask Marking on the inside byAt a glance 100% Polyamide Material Zipper Closure 2 Waist Zipper Pockets & 1 Chest Pocket Excellent Thermal Cold Weather Piece Secreted Hood Elasticated Cuffs Adjustable Neck & Hem Drawstring Wireframe Hood Lightweight Water Repellent Solid Olive Colour Pit to Pit: 23" Suggested Size: Medium Regular Label states MEDIUM Sleeve Length: 24. 5" Regular Collar to Hem: 26" Modern Militaria Issued 2010's Genuine British Army Surplus Grades Grade 1. 5 Good