The Collaborative International Dictionary of English v.0.48:
Spick \Spick\, n. [Cf. Sw. spik. See Spike a nail.] A spike or nail. [Prov. Eng.] [1913 Webster] Spick and span, quite new; that is, as new as a spike or nail just made and a chip just split; brand-new; as, a spick and span novelty. See Span-new. --Howell. [1913 Webster]