Hmm, seems that everyone is wanting information on baldwin organs, including myself
I believe that the D431 was built in about 1989. Also, my best guess would be that it was built between Viscount or GEM.
Call Music Electronics (www.musicelectronics.us). They know anything and everything about Baldwin organs.
Also, you can hide your e-mail address from the public and only allow registered users to view it, which would also hide it from spambots.