found this ATE brake booster

[deQuincey]

love barn finds, well it was not exactly a barn
i plan to keep it for my coupe, it is the single effect for early models like my 3.0 1971

never saw one in NOS cond, i tried to repair mine (better say have the spares ready) but no avail, the big membrane was NLA

 

[Gransin]

That's a nice find, I went through three used boosters before I found one that was functional..