I just picked up a bunch of older thread that seems to be in good condition. Along with the older wooden spools of Gudebrod I found some Holland thread. It looks like the Gudebrod Trimar. Its listed as Astro Nylon Size S/C Color 9003, 9002 etc. Do I need to use color preserver on this thread? I figure I'll use it as an underwrap with some black or blue as the overwrap. Also how does this size compare to Gudebrod?