This reservoir was originally installed on many mid to late production 1966 Mustangs and Shelbys along with early production 1967 models. 
Later 67's used a plastic washer reservoir (EG315 or EG3152.)
Our washer bag is the abolutely best one on the market.
It is actually nicer than the now discontinued service (NOS) part that was avaiable from Ford years ago.
Made in the USA.
Please don't confuse this one with the cheaper reproductions.