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What is the date for the H5 to M5 switch

Posted: Mon Apr 08, 2019 10:33 am
by Engineer Bill
Many Western Maryland enthusiast have ask over the years what units had the H5 horns vs M5 horns as delivered? Does any one know what the time frame for the switch was from Nathan H5 to M5?
Engineer Bill

Re: What is the date for the H5 to M5 switch

Posted: Mon Apr 08, 2019 1:18 pm
by railgeek
Summer of 1950 is when Airchime stopped shipping H5's and switched to M5's. On July 24, 1950, some of the first M5's were shipped to Holden Co. Ltd. Before that it's all H and N horns.