American Conservatory was a Washburn brand. The 1919 Catalog shows images of this very model, a model 91.  Here's the original description: “Genuine rosewood (Brazilian) back and sides, hand polished, fancy strip inlaid in back, back edge bound with white celluloid, front edge bound with celluloid and fancy colored wood, spruce top, celluloid guard plate, inlaid sound-hole, mahogany neck, ebony fingerboard, pearl position marks, our own make machine head, nickel-covered shell-pattern tailpiece.” 
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Work Done:This got a complete re-build.The  fingerboard, neck and top were removed to repair damaged braces. They ALL were loose so they were removed, cleaned and re-glued.  Top splits repaired and cleated, top re-installed and bound,  neck angle corrected and fingerboard  re-glued.  The entire instrument was cleaned and lightly french polished to restore the finish.
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All original except the top binding which was brittle and disintegrated when I removed it to repair the face cracks.   Beautiful Brazilian Rosewood body and head plate, ebony fingerboard original nut, original tuners.  This is the real deal, an excellent sounding, Brazilian rosewood madoletto that looks great and plays extremely well!   The high end versions of these for well over 1,000.00.
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Beautiful player with great tone.