dan barnes is correct i think. i'm pretty sure the spyder marking started happening around the time of version 4 revs on delica/endura models for their standard line items. however, i don't know what the other markings on the other side of the blades are either, and i would like to know. i've got a caly 3 coming, and i know that it has these markings. it almost looks like SAL in jumbled up letters.
hopefully someone can help use out with that one.