That's an unusual casting / jaw / swivel setup, I've never seen before. Usually, I'll only date a vise to an era, without a date-stamp. But in your case, I think we can get pretty close.
My theory is based on printed and dated data from old catalogs and magazines, paying attention to the casting / jaw / swivel setup.
Sometime around 1922, Columbian Hdw. pioneered the universal base, allowing the main base casting to be either a stationary or swivel model. About 1926, Columbian Hdw became Columbian Vise & Mfg Co. They also incorporated the "T" style jaws at that time. Your vise has the Columbian Hdw casting with the Universal base + the "T" style jaws. I believe your vise is from 1925-1926. Final answer.
I dropped you a timeline of photos, based on the data I have. Fun puzzle.