When Ken Shyvers, creator of the Shyvers Multiphone,  died in the 1970s his two sons inherited his estate.  His son Bob ended up with the bulk of the remaining Multiphones and other machines.  Bob also got the 4 by 8 foot key board seen here in my photographs.  After Bob passed away in 2019 my great friend John Bennett bought all that remained of the Multiphone parts plus he got the key board.  I got the keyboard from John shortly after that.  Eventually my plan is to list each key maker and number in my eBay store.  Unfortunately there is no known list that tells us what machines Ken and Bob used the locks on that these keys fit.

From experience I do know that at least some of the Streamline wall boxes use the type of Chicago lock that accepts the key profile I am offering in this listing.