by JimN » 01 Mar 2023, 16:48
One each at any time.
There is more than enough reason to believe that Hank, at least, had one replacement white Marvin at some stage, since the one he used in the late 1960s and up to mid-1972 had a bound neck.
Of course, there was also the set of greenburst instruments as seen in "Finders Keepers" and "Rhythm And Greens".