In an earlier post I waxed poetic about the acquisition of two early 20th-century treadle sewing machines and the tender disassembling of the cabinet for one. I am always impressed by the quality of the craftsmanship of these older machines. This same respect for machinery (the cutting edge technology of its day) is manifested in the instruction manuals published for the buyers.
I was able to track down manuals for both my Wheeler and Wilson and Singer machines. One is a scan of the original. The other is a re-creation by the Singer Sewing Machine Company. What makes these 'cool books' is the craftsmanship of the illustrations and the detailed information provided.
The Wheeler and Wilson Manual was bought from the folks at RELICS.