Finally found a somewhat "heavy" solution to get wine installed on 64-bit Sparky 4.5.2; namely, install a relatively new program called wine-staging:
sudo apt-key add Release.key
Next, add their Debian Sid repository to /etc/apt/sources.list:
deb https://repos.wine-staging.com/debian/ sid main
sudo apt-get updateIt appears only the Sid repository works for Sparky, as I first tried Wheezy, Jessie and Stretch without success. The execs are /opt/wine-staging/bin/wine and /opt/wine-staging/bin/winecfg.
sudo apt-get install wine-staging
sudo apt autoremove
I recommend wine-staging be put in the Sparky repository.