@ Pat, Thank you for the kind words!
Bob, so glad it found a great home. Walsh & King book, The Martin Ukulele pg169, shows two custom circa 80's, models. One a "Custom Spruce Top Baritone" w the CF Martin 1833 lettering, the other a "Custom 5K Baritone" w Koa top, abalone/MoP inlaid design on the headstock, bound fretboard and different inlay designs in the usual frets. The R&D appears top be a mashup of the Spruce top and regular fret dots of the one and the MoP of the 5K.
P.S. Pg. 168 shows a "Custom Koa Baritone', headstock CF Martin lettering, unbound, no MoP.