It depends... Are there any markings on the pickup?
It could be a "Duncan Designed" pickup, which are made overseas to Seymour Duncan specs, and modeled after pickups in the SD line.
Which model and year Squier did the pickup come from?
Any pics of the original guitar and / or the pup itself?
It could be a stock Squier design, made in house in whatever factory the original guitar came from.
BTW, that's not necessarily a bad thing. A good pup is a good pup, no matter whose hands (or machine) wound it. Without knowing more info about the pup itself and / or the guitar it came from, the only way to tell is to wire 'er up and see what happens!
Guitars:
Fender 2006 MIM Fender Stratocaster HSS in 3TS
Ibanez RG 570 with a bridge Invader
ESP M II Deluxe with a Tune-o-Matic bridge
Eleanor, the magical, mystical Road Worn wonder Tele
Blackstar HT Club 40