  Interference effects in finite sections of one-dimensional moir\'e crystals
are investigated using a Landauer-B\"uttiker formalism within the tight-binding
approximation. We explain interlayer transport in double-wall carbon nanotubes
and design a predictive model. Wave function interference is visible at the
mesoscale: in the strong coupling regime, as a periodic modulation of quantum
conductance and emergent localized states; in the localized-insulating regime,
as a suppression of interlayer transport, and oscillations of the density of
states. These results could be exploited to design quantum electronic devices.
