1960 PHILCO DUO-MATIC
Cool ad thanks for posting it. This is the exact machine I have in the electric vented model. The dispenser system that this machine has and Tom was describing was made by Controls Corporation of America. The same system was used on the 1960 LKM top loading washer to store and dispense liquid detergent and fabric softener. On the LKM at least they had the good sense not to use this system for LCB. And even though the reservoir is sealed I can still imagination the corrosive damage that storing a 1/2 gallon of LCB inside a machine could do, the GE washers with LCB storage turned into a big rusty mess. Fortunately on our Duo-Matic it doesn't look like the LCB dispenser was ever used, and in fact the entire machine is in almost perfect shape.
I believe that these two machines were the only two to make use of this clever way of storing, measuring and dispensing liquid laundry additives.