Is Duel a Serbian brand?
Yes. Duel is a Serbian brand.
company: Beohemija d.o.o., Pančevačka 84, 23000 Zrenjanin
why it is listed
Beohemija (Pančevačka 84, Zrenjanin) publishes Duel, Spin, Selection and Pompa as its own laundry, softener, dishwashing and household-cleaning brands. Serbian-owned, unlike the Merix/Persil/Bref lines made in Serbia for Henkel.
Source: beohemija.com
Local alternatives
Since this product is registered with GS1 Serbia, here are some Kosovo/Albania alternatives in the same category:
Rea Efekt (Get)
Get sh.p.k., Zona Industriale Shkozet, Durrës — Albania
Get sh.p.k.’s own about page: "nje kompani me nje ekperience te gjate 20 vjecare ne fushen e prodhimit te detegeneteve" (detergent production), site tagline "Fabrike detergjentesh". Its Rea Efekt page describes "pluhur lares per rrobat i cili vjen ne sasine 3-5kg".
same categorySource: get.com.al
Reported pairing: get.com.al
Rea (Get)
Get sh.p.k., Zona Industriale Shkozet, Durrës — Albania
Get sh.p.k. (Durrës) describes twenty years in detergent PRODUCTION with the Rea brand distributed across Albania; site title "Fabrike detergjentesh". HONEST CAVEAT: its homepage separately describes the company as focused on detergent TRADING, so the two pages disagree.
same categorySource: get.com.al
Reported pairing: get.com.al
What this means — and what it doesn't
A GS1 prefix only shows which organisation the barcode owner is registered with — not necessarily where the product was manufactured. The real place of manufacture is on the physical product's "Made in" label.