SteeleJohnson300, (two part button, hat or sleeve size, 15mm).
Backmark: "STEELE & JOHNSON / (star) " dm no rings, depressed area for shank, small size only, manufactured after the Civil War, (SteeleJohnson300).
Research Center: Button9901-Backmark-SteeleJohnson300, Reference: Tice, Dating Buttons.
Ref: Veteran button., manufactured after the Civil War.
B5105 National Home Disabled Solders & Veterans button, post war, Steele & Johnson, (15mm)