I havent moisturized the leather but I suspect if you did it would wake it right up for another 100 years of use. This jacket fits very much like a modern tailored medium, chest size 40 or so, on the slim side. Pit to Pit jacket buttoned and laid flat: 22.75. Length from collar back in back to bottom of jacket hem : 36.5.
Shoulder seam to sleeve end: 26.5. I wear a modern medium size 38-40 jacket and this jacket fits me perfectly. The item "Vintage Wool Horsehide Hercules Barnstormer Mackinaw 30s Salt Pepper Half Belt M" is in sale since Monday, February 19, 2018. This item is in the category "Clothing, Shoes & Accessories\Vintage\Men's Vintage Clothing\Outerwear Coats & Jackets". The seller is "homesteadsupplyco" and is located in Pittsburgh, Pennsylvania. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion.