David, pre-war skeet #9291: no, no, no. Single trigger. Interestingly this Super has no engraving of any sort on it.
Pre-war field #4449: no, no, yes. Twin single trigger. Close examination reveals U and O stamped inside triggerguard under the corresponding trigger.
Surprisingly, the skeet gun has the same stamping inside the triggerguard, even though it is a single trigger gun.....And has the selector on the safety, even though both barrels are choked the same......... Grant.