Wuhlmaus Shaker Sprocket.
This is new old stock from a former Wuhlmaus dealership although it has 45 written on it in permanent marker I believe it should be 46mm as I know this was a standard web spacing. Has the number 2.11 written on it in permanent marker and 6342-4 in casting. These are genuine new parts but are showing signs of age for long term storage. (Scratched and slight corrosion)
Will also fit some Standen machines as they marketed some machines under there name