Sizes are 7/8” to 1.5”. These are primarily 1900-1910. Companies include Maytag, Plano, one for the publication “Thresher World” which has small hole on lower rim which once held a clicker. Row 2 buttons are all for Racine-Sattley. Buttons in bottom row are for Leader Threshing, “Bulldog” cylinder with a few barely seen age dots at 7 o’clock and “Craver Harvester King” with great color although red text has faded. Last item is celluloid with wire pencil clip reverse showing “The Hoover” potato digger. Small bit of stain. All still have full gloss and display well. Many scarce to rare.