🚀 go-pugleaf

I previously posted an article in sci.electronics concerning the lifespan
of a typical (high quality) watch LCD display.  The answers were unsatisfac-
tory to me, so I'll try to ask a different crowd ...
    Given normal use and normal environmental conditions (which, for my
purposes means temperatures between zero and 30 degress centigrade), how
long will an LCD unit continue to function without fading or failing
altogether.  I understand that the organic crystals that make up the
guts of the LCD do not generally react unless exposed to air.  And so,
if the seal between the two glass sheets remains, the LCD should continue
to function, at least in theory, for a "lifetime" (>50 years).  Do the
seals on these LCD units hold up over time (are there any specs on this)?
And, if not a "lifetime", what is the average estimated lifespan of the 
LCD unit?  And one more question:  What other age limitations might
exist in the components of the typical, high quality LCD watch?  For
example, do the piezo-quartz crystals fail; do the diodes fail; do the
capacitor(s) fail?  (I know nothing lasts forever, but does anything last
close to forever? (: ) 
     Sorry for all the bizarre questions.  Any help is appreciated.

                                -- Joshua Bloomberg
                                   Cheeze@wam.umd.edu