Mine is marked per my wrench list.
127 Adjustable Wrench, Center Wheel Adjusting Style, J. C. Speirs & Co, Drop Forged, Central Cycle Mfg Co Indianapolis IND, (Central Cycle in business 1892 – 1898) Patent March 26, 1895, Patent #536,301, J. C. Speirs Worchester MA, 4 ¾ Inches Long, Schulz #106
So I guess they sold them to different bicycle manufactures.