We present a preliminary measurement of the mass 
of the W boson by direct reconstruction,
using approximately 217\,pb$^{-1}$ of data collected by OPAL in 1999
at centre-of-mass energies from 192 to 202~GeV. 
Using a fit to the distribution of
W mass reconstructed in events of the type 
$\rm W^+W^-\rightarrow q\bar{q}q\bar{q}$ and 
$\rm W^+W^-\rightarrow q\bar{q}\ell\nu$, we obtain
\[
              M_{\rm W} = 80.523 \pm 0.073 \pm 0.042  \;\mathrm{GeV}
\]
where the first error is statistical, the second systematic.
Combining this result with previous OPAL measurements at centre-of-mass 
energies 161 to 189~GeV
we find
\[
              M_{\rm W} = 80.485 \pm 0.052 \pm 0.039  \;\mathrm{GeV}\,.
\]