Help identify 12″ spigot internals replacement

I need to identify the spigot so I can replace the internal stem system. Previous home owner did not make it easy to remove the spigot all together so I’m looking to replace the internal parts only. Once I know the make and model I can buy it and fit it for the internals. The big problem here is previous owner cemented the hell out of it and the vinyl is stuck. Idk how I’ll get to it without making a mess of the vinyl siding.