What you would have had, is a Crescent Machine Company #2 Table saw with boring attachment.
The large base is to provide room for the attachment.
Date isn't known, but the #2 without the attachment is dated around 1910
That thing is likely over 100 years old.....
If you look closely at the OP photo, on the bottom of the side of the casting you can see the mfg logo cast in a large half circle .....