  The quasar Q1208+1011 (z_{em}=3.8) is the second highest redshift double
quasar ever detected. Several indications point toward it being a gravitational
lensed system, although a definitive proof is still lacking. We present new
evidence of its lensed nature based on the weakness of the ``proximity effect''
measured in the high resolution Lyman absorption spectrum of the QSO. A
luminosity amplification as large as 22 has been derived from this analysis.
Indications on the redshift of the lensing galaxy can be obtained from the
analysis of the intervening heavy element absorption systems discovered in the
QSO high resolution spectrum. On statistical and dynamical grounds a MgII
system present at z=1.13 appears as the most likely candidate for the lensing
galaxy. We compare the observed parameters with a simple isothermal model for
the lens to derive the properties of the lensing galaxy. The resulting
magnification factor is smaller, although marginally consistent with that
derived by the analysis of the proximity effect.
