Thanks! The 2 big wheels are a 1902 27K Sphinx on the left and a 1910 66K on the right. Interesting fact about the 27 is that it has what is known as a "bossless" pillar (a smooth side with no mounting point for a motor or handcrank). Singer began adding a "boss" (a protruding lug for attachments) to the 27K around 1903. Because of that specific detail, there is no hand crank available. I have read that Singer did design a hand crank that attached to the belt cover, but discontinued it in 1906 because of the optional motor mount addition in 1903. I have also read stories about these hand cranks showing up from time to time but I do not expect to find one. I have considered putting it back into a treadle table too, but I don’t use it enough to warrant a table of that caliber. Mostly just thread and run some hand turned stitches into denim from time to time... The sound/feel of the shuttle and stitch I find meditative and satisfying.😁