\begin{table}%t2 \par %\centering \par \caption{Comparison of observed SWB parameters to those calculated from a simple time-evolution model of a SWB formed by the wind of a single~O5.5V star, chosen to match the observed wind luminosity~$L_{\rm w}$ at the minimum age of the bubble ($t=1.4$~Myr). Model is from \citet{mck84}. The stall velocity and age for the bubble are near the lower and upper limits of those same parameters as measured, respectively. The stall radius is~30\% larger than the observed radius, but is within uncertainties. The~SWB surrounding 3C~434.1 is apparently in its early stages of dissipation. \label{param2}} \begin{tabular}{ccc} \hline\hline Parameter& Model& Observed\\ \hline $L_{\rm w}$(10$^{36}$~erg s$^{-1}$)& 3.5& 5.1\\ $L_{\rm w}^{*}$& 2.73 (at $t=0$)& 3.26 (at $t=1.4$ Myr)\\ $S_{49}$(10$^{49}$ photons s$^{-1}$)& 2.3& 3.0\\ Stall Radius $R_{\rm b}$ (pc)& 5$0\pm 10$& 3$4\pm 7$\\ $v_{\rm e}$ at stall (km s$^{-1}$)& $11.4 \pm 2.3$& 14\\ $t_{\rm stall}$ (10$^{6}$~yr)& $2.6\pm 0.5$& 1.4--2.6\\ \hline \end{tabular} \end{table}