Single engine Sea, is all, I'm pretty sure.(Sorry ! should have remembered; it has two engines !?!...so MEL&S...even nicer)
When I was a kid, Osa & Martin Johnson used to have a pair of them in the newsreels at the movies (10 cents); always exciting to see them. One giraffe and one zebra...but that's from memory
I know where there is one at the bottom of a lake in Alaska...but it's under 60 feet of glacial silt, last i heard, and millions of dollars were involved and still no airplane...So I have personally given up gracefully to ever having one!?!
Johnson Wax built a replica of theirs...just beautiful ; I came across a documentary of the process some years back.!!
I was restoring my old Travel Air Monoplane and put "wicker seats" into google , and the Sikorsky popped up, with the whole story of the reproduction and flight of 'grandfather's airplane...haven't taken time to fugure out where the "Carnauba" that is being discussed fits in...Is that the one that sank, or more likely, I hope, the original... and the replica is basking in luxurious
quarters somewhere.
Bill
(AS&MEL&S...when I was young!)