J. Press x Grenfell vintage "new" (deadstock) trench coat

This is a 1970s J. Press trench coat, with detachable warm liner, made in England from Grenfell cloth. It is in original condition, as it is a deadstock item that never sold at retail and was stored since then. I purchased it in 2014 at the Front General Store, a respected and well-curated vintage store in Brooklyn, New York. However, the coat is slightly too small for me, so I never wear it and would like to sell it.
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Cut: Mens regular.
Size: 50 (Europe), 40 (US/UK).
Coat: 100% cotton.
Liner: 76% wool, 22% nylon, 2% cashmere.
All buttons, leather buckles and zippers are original and in perfect condition.
Additional images are available.
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J. Press was founded in 1902 on Yale University's campus in New Haven, Connecticut. Additional stores opened in New York, New York; Washington, D.C.; and Cambridge, Massachusetts. These 4 locations are listed on the J. Press label inside this coat.
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Grenfell Cloth was founded in 1923. It was named after Sir Wilfred Grenfell, a British medical missionary working extensively in Newfoundland, Canada. He required a cloth to be woven to protect himself from the snow, wind, wet and cold weather he encountered in his work. Cloth is made from 600 thread-per-inch cotton originally by T. Haythornthwaite & Sons Ltd at Lodge Mill, Burnley, in the United Kingdom. This manufacturer is listed on the Grenfell label inside this coat.