GDC Ferreira is a club from inland Portugal whose identity is built around green and white — colours rendered here in bold horizontal stripes on a home shirt manufactured by Playoff. The brand was one of several Portuguese sportswear labels that kitted out smaller clubs during a period when local production still had a foothold in the market. For a collector, that context is precisely the point: a piece of grassroots Portuguese football, away from the spotlight, where the stripes carry the whole story.