This is a genuine Hornby replacement part, it's brand new and factory sealed. As found on service sheet 380B for Railroad class A1 A3, also fits the Flying Scotsman model R3086.

Please check out my other listings for hundreds more Hornby items. 

I dispatch on the same or next working day depending on what time you pay. 

Sorry no collect in person, all items are post only even if you're local.