Jon,
Great looking Sheffield bat, I'm a big Sheff fan and have lucked out and grabbed two of his rookie bats, one Worth and one Cooper. Both of mine have his number "1" written on the knob. According to baseball almanac it appears as though he wore #1 in '88 & '89 and switched to #11 during the '89 season. Does anybody know if this is possible or if this happened? I posted a pic of my Sheff bats under the Worth bats post.