Vintage pedals: identify the revision before comparing prices and components

Many pedals and effects go through production revisions without a major change in commercial name.

Before comparing two examples, check the enclosure, graphics, jack layout, power arrangement, PCB, chips and other identifying components where they can be inspected safely.

Do not assume an earlier or rarer revision is automatically “better”; demand, sound characteristics and availability also matter.

Document the revision as a plausible range if the evidence does not support a more exact classification.