Aftermarket (?) girdled head. It’s not pretty, its not name brand but it works well. No idea who made it. Ran it on my 701 for years and was getting 180psi. Fits 4 ADA size girdles. I will include 4 used riva girdles and studs with it. Also has orings that are useable. If you are handy with machining you might be able to make it look good. $100 shipped
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