thank you
the Ibanez Overdrive is the first one they've ever produced - there are two versions available ... in this case you should watch out for the older one
the pedal on the left, with the "Roland-SH-styled" Overdive label is the older one (from 1976) it has the balace control in the middle and the tone on the right, it has been produced in japan - the one on the right is the newer one (produced after 1977 only) ... don't know wehre it comes from - but it sounds not as raw and dirty as the older one - this version has the balance on the right and the tone control in the middle.
And ever keep in mind, these old pedals (especially overdrives and distortions) have to be used with a 9V block, u can't use an adapter to power the AC jack (with analog gear a higher tone control produces a lot of noise while in full "wet" balance)