First Rat bike, please help identify. Thanks.

Hello to all, I took a vacation day today, and went to swap meet. I picked up this bike. My first Rat bike since I started in 2010. It's a real tank very heavy. Metal badge reads "Murray" and also "Mercury". The saddle is a stamped Lobdell Emery MFG Co., back hub is a New Departure D, and front is a New Departure W. Can someone plaese help me the aprox year, and model? I sincerely thank you and appreciate it.




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