I know of two Elancos--one makes experiment stuff for kids, and the other is a veterinary pharmaceutical company. Given how many Schrades I have seen relating to veterinary pharmaceuticals, my money is on that Elanco.
It wasn't spun off from Eli Lilly until 2019. Schrade had previously produced knives for the former, so my money's on them.
https://en.wikipedia.org/wiki/Elanco
As far as date, check the manual/letter in the box, as they often feature a dated copyright. Secondly, I have an 885 in what looks to be the same box, and there is an ad inside for the then-new SP-series lightweight folders--and they were introduced in 1987.