Riddle: What are the models?
First of all: It's very pleasant to have only less than a handful of PRSi.
My guitars all live on the disc world mounted on the backs of the four elephants Berilia, Tubul, Great T'Phon, and Jerakeen, which all are standing on the back of the star turtle Great A'Tuin.
My backs are all flat.
Line-up to unveil "riddle":
2005 PRS 513 RW (10 Top, which was serial; flamed top, which was standard and no additional option; golden hardware, which was extra charged)
2011 PRS 513 MT (10 Top, which was extra charged; quilted top, which was optional w/o being extra charged; modified from PCB to PtP as a present of Paul)
2013 PRS SE Mark Tremonti Custom BCQ [a special run for Thomann only (quilted veneer plus "colour" shade (Cherry Sunburst Quilt, Whale Blue Quilt, Black Cherry Quilt) instead of serial Gray Black]. The depicted elevation is caused by an unrecessed spring compartment cover.
2016 PRS SE Mark Holcomb (one of the first 2017 copies with the PRS signature on the headstock)