Everyting you ever wanted to know about Packard shutters:
http://dougkerr.net/pumpkin/index.htm#Optics
(about 1/3 down the page)
And from the horses mouth:
www.packardshutter.com
Reinhold
www.classicBWphoto.com
Not quite, Reinhold!
Doug has no experience with solenoids in the Packard shutters and there's no more information at the Packard site that
listing what you can order. The owner only knows how to make them as his Dad did before him. In fact, there's a need for articles on solenoid control of Packard shutters and timing circuits. One can find little bits around the net, but nothing authoritative.
Asher