Label reads "C150" which going off the Swedish Army's sizes is to be for a 100cm chest and in long length

These saw general issue in the Hungarian People's Army's tank divisions and I believe a few other motorized branches

Chest Size: 45" / Large Slim - Label states around 104cm

including small markings

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Hungarian People's Army Olive Green Field Parka - X Large Summer Label reads "C150" which goingAt a glance 100% Cotton Canvas Material Water Repellent Showerproof 2 Waist Pockets Wrist Handwarmer Pockets Hidden Button Closure Cold War Warsaw Pact Eastern Bloc Kit Button Detachable Quilted Liner NOT Included Belt Loops Heavy Duty & Durable Engraved Top Button Classic Olive Green Colour Chest Size: 48" Suggested Size: X Large Slim Sleeve Length: 25" Regular Collar to Hem: 36" Vintage Militaria Dated 1977 Cold War Genuine Hungarian People's Army