Hi Lou,
You did good!! Really good.
Those “V” shaped corner clamps are not common. They were a patent by J. L. Taylor, November 30, 1909, no. 941,825.
The Colt patent was 792,758, issued June 20, 1905.
I had one pair of the Taylor’s, the only ones I had ever seen until yours. They bring a decent price on the ‘bay. I have yet to run across any of the Colts.
Who made the little Drill Press? My first guess would be Goodell-Pratt then Millers Falls.
Mike