Re: Duncans with Short or Long legs? Purpose?
The first SD humbuckers all had long legs, just like the old PAFs. Then, we started offering short legged humbuckers to fit into thinner bodied instruments. In the early '90s we decided to shift all non-vintage humbuckers from long legs to short legs.
The current vintage humbuckers, e.g., '59, Seth, Antiquity, etc., continue to use the long legged bottom plates. Some OEM customers order '59s or Seths with short legs.