Gilkerson Machine Works
Homer, NY (The Railroad, Telegraph, Electric and Steamship Builders' Buyers' Guide, 1897)
The earliest reference we have found for this company is this article on Gilkerson's Planer Vises in the November 14, 1885 edition of American Machinist.
The Hub, Volume XXX of March, 1889 reports that the Gilkerson Machine Works were succeeded/acquired by Cook & Dinsmore in October of 1888.
It appears the Smithsonian does have a catalog which we will investigate at a later date.