Most of Washburn's line was very well constructed using X bracing and Waverly tuners. Their model number 308 was elaborately inlaid and the wood was AAA. During it's day this was the most ornate guitar on the market. It had intricate pearl inlay work running along the outer body contours, rosette, fretboard and headstock.
Lyon and Healy produced a tenor guitar which was tuned exactly like a tenor banjo and had four strings and a longer neck. They also introduced what I think is their most unique instrument, the bell shaped guitar that had gold painted designs on the upper body. Another guitar, the shrine guitar was also produced.
By the end of the 1920's, both gentlemen had died and the company was sold to the Tonk Brothers. They were a large manufacturer and had many other lines of musical instruments.
So the quality of the Washburn brand deteriorated which lead to the brands decline.
Carl Sandburg, perhaps America's greatest poet, owned and played a Washburn Bell guitar.