I think this long-neck, bowlback mandola by M. Iucci of New York is quite rare. While the label inside the mandola reads "Manufacturer of Mandolins and Guitars," I've only seen one Iucci mandolin: the banjo-shaped instrument photogrphed by Paul Hostetter-- http://www.lutherie.net/no_bows.html --he made one like an Iucci and praised the tone. I assume Iucci made other banjo-shaped mandolins. Paul writes, " I love the guitar. It’s my first instrument, and I own probably fifty examples. Among my favorites (though I don’t sure own all of these!), in something approximating chronological order: Antonio Stradivari, Antonio de Torres, Joseph Bohmann, Luigi Mozzani, Orville Gibson, Lloyd Loar, Iucci, D’Angelico, the Larson Brothers, Mario Maccaferri, and others." That's putting Iucci in a very high category.
I did manage to find some great photos of some gorgeous banjos he made: #http://www.banjoworld.de/Iucci.htm . I thought the aluminum tailpiece on this mandola was probably made later by someone else, but it's almost the same as the tailpiece on one of his early banjos: http://www.banjoworld.de/High375.htm To change strings, one turns one of the screws. A j-shaped brass piece loosens, and one can put on two strings. By tightening the screw, the j-end of the piece enters a hole in the tailpiece (otherwise it would bend). This isn't used for tuning.