Is a vintage E61 steam valve the same as the modern steam valves?

Well that answer is pretty simple, no it isn’t. The original valve works as following, when you turn the shaft inwards the valve pin will push a gasket holder. The steam can go out, close it again and no steam can go out. In the case of the modern E61 valves is that behind the gasket holder is a small stainless steel ball with a spring.