Items range from 7/8" to 1-3/8" tall. First three are enamel on brass lapel studs for meetings of the "National Railway Appliances Association." These are dated 1913, 1914, and 1919. First two pieces in row two are enamel on brass for conventions of the "Association Of Railway Electrical Engineers." These have loops and may have been suspended from something else. Next is for "A.R.A. Boston 1920/Equipment Painting Div." This shows a speeding locomotive. Next are a pair of white metal lapel studs in a wheel design. Both of these are from 1902 convention in Saratoga with the initials of the organization "American Railway Master Mechanics Associations." In row four is 1904 button from "Road And Track Supply Association." This has W&H back paper. Next is brass lapel stud surrounded by celluloid for 1906 Chicago meeting of the same group as the previous item. Last is brass piece that was suspended from something. This reads "Railway Equipment Manufactures Association." All items are Exc. to Mint.