Basically, the Mark V is made of two M400 in a single cabinet, with a built-in stereo reverb. Thus, it has two 35 note keyboards, but only one capstan, a double volume pedal, two audio outputs (High and Low) and a pan control for each keyboard, and a headphone socket.
The cabinet was made of wood, covered in black vinyl.
The motor controller card was a SMS-2.
The Mark V was one of the rarest Mellotrons.
The prototype created in 1974 reportedly belonged to Jimmy Page.
The first Mark V was made on February 13,1975. Serial number : 5/101A
The last one was made on February 7, 1980, by John Bradley. Serial number : 5/130
The last four Mark V are Novatrons (see A Mellotron history).