Your Elmira looks like the same general model as my Richmond treadle machine. Mine belonged to my great-grandmother and based on information from this board I believe it was an Eldredge machine manufactured by National between 1890 and 1900. It was a badged machine sold by the Charles William Stores. It takes a longer Eldredge needle but mine works fine with a standard needle that I don't insert all the way to the top. The shuttle on mine is stamped (in very small letters) with Eldredge, so you might check there for a clue. Mine is pictured on page 983.
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This one does look very much like yours. the decals are different,but the machine itself looks the same. Am getting closer! I still dont find anything that says it's an Elmira. Would a small sewing shop badge their own and there be only a few?