Ducati Single 37mm Int/Exh Valve NOS Scrambler Mach 1

I cannot figure out the online parts book so I'm just guessing at the correct part # 0520-92-110.  Perhaps someone can help.  Please do so if you're CERTAIN.  I sometimes get help from folks who think they know, but don't.

Anyway.  This valve was made by a a company called Frecchia Valvola.  Condition is new and excellent.  Head diameter is 37mm, stem diameter is 8 mm.  Overall length a bit longer than 87mm, distance to collet ridge a bit over 6mm.  Material appears to be steel.  I believe it is definitely suitable for the large port intake of Scrambler, and perhaps for the exhaust of high-performance Mach 1 with 40mm intake valve and 29mm carb.