<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr" data-setdir="false">There are two separate rosters of SD40-2 locomotives. 1600 and 6000 tow 6200. Is this because the 1600 numbering ran out or are the two groups very different inside or out. Are there other series of numbers for the "same" locomotives like this? </div><div dir="ltr" data-setdir="false">GP38s are 4100</div><div dir="ltr" data-setdir="false">GP9s run from 500-920 or so where GP18 start (approximately).</div><div dir="ltr" data-setdir="false">Thank you. My curiosity is boiling over.</div><div dir="ltr" data-setdir="false">Mike Shockley</div></div></body></html>