This one is very bizarre to me, never seen another exactly like it. Surely it's a 1966+ 275 GTB4 competiizione, but it appears to have more of a GTO nose treatment than others. EDIT: okay I found it. A 1964 GTB/C Speciale, one of 3 built.
No decals. You can get some information on this kit from Harry P's book, page 57." Instead of trying to recreate the very thin dual black and red stripe look, I went with single, wide black stripes. I created all the stripes by masking the body panels with Scotch tape, and cutting the stripe shapes freehand with an X-acto. It wasn't easy to get the stripes perfect cutting the mask by hand, but I think I did pretty well." Details on his build here: http://www.modelcarsmag.com/forums/topic/75837-1913-mercer-raceabout/