They appear to be for the base parts of a railway vehicle model where you would find bogies, axle guards, etc.
Collection Of Three Vintage Rare Railway Themed Metal Badge
Springside No. 5 White Metal 4mm OO Gauge LNER Head and Tail Lamps White
Springside No. 3 White Metal 2mm N Gauge BR Head and Tail Lights White
London Midland & scottish Railway button set of 10 white metal 26mm
London Midland & scottish Railway button set of 7 white metal 26mm
KEEP CROSSING CLEAR Metal Railway Sign with Retroreflective white background
