this is the earliest one I can find that has the filters wired to be on all the time
 
Mica,
I'm trying to follow wires, but I'm confused. Do the Filter Freq & Q knobs sweep each pickup simultaneously? Or is the signal summed and run thru the filter parallel to the direct signal?  
You're referring to the circuit in the plural, but I'd imagine you'd need quadruple stacked pots to pull off my first guess?!???!?

Anyone know where to get a couple of those double bar knobs? They would be perfect for my coil selector rotary switches on my Starfire!

Finally, the website is ready and a date has been picked for the eBay auction, June 5th until June 12th 7PM PST. Lots of photos, history, auction info and even video of Alembic 72-13 here;
http://www.jerrygarciaguitar.com

The Jerry Garcia Alembic 72-13, Lucky #13, auction is now live.  
 
Visit eBay http://cgi.ebay.com/300559286552  
 
Put in a bid before it ends June 12, 2011 19:00 PDT  
 
More info and photos here http://www.jerrygarciaguitar.com  
 
All proceeds from this auction to benefit Amicus Foundation of Thailand. Please spread the word via Facebook and/or Twitter.
 
A BIG THANK YOU FROM ALL OF US AT AMICUS TO EVERYONE WHO CONTRIBUTED TO THIS POST. You helped us discover some of the early details and provenance of Lucky #13. See you at eBay?

Complete with a letter from Bob Weir stating the guitar was made by Doug Irwin?!!!!!!  WTF!!!!  
 
Bill, tgo

Hi Bill, this Letter of Authentication was written before I had come across this site and learned more of the history of the guitar. On the home page of our website and in the eBay auction description of the guitar I include Ron Wickersham, Rick Turner, and Frank Fuller.