Marshall Regulator Valve.
 

Modified type with pilot valve for easy starting and control.

Extra information, I’ve fitted this type of valve to both 7&6 singles, and also a 7NHP Ransomes single.

I’ve recently been asked for another set of these castings. So whilst the patterns are at the foundry, I wondered if anybody else required a set? Cheers.

Modified type with pilot valve for easy starting and control