"its first concept" is a correct and usable phrase in written English.
You could use it to refer to the initial idea related to whatever subject you are discussing. For example, "The report outlines its first concept in detail, including the reasoning behind the idea."
Last month, it opened its first "concept store" in Concord, N.C., where parents can bring children for birthday parties and classes with master builders; another concept store is set to open near Baltimore this fall.
The H1, its first concept watch, for example, introduced at Baselworld last year, uses a unique hydraulic transmission system to tell the time.
Razer, the billion-dollar firm often labeled the Apple of PC gaming, is finally opening its first concept store in the U.S. this weekend.
Electric car company Faraday Future unveiled its first concept car, the FFZero1, at CES 2016 this evening in Las Vegas, Nevada.
Faraday revealed its first concept car, the FFZERO1, at CES earlier this year — an electric car with the look of a Hot Wheels toy.
Faraday Future, the secretive Chinese-backed Gardena automaker, finally unveiled its first concept car at CES: a sleek, silver-and-black Batmobile-esque electric vehicle called the FFZERO1.
It recently opened its third concept store in Bangkok (after Taipei and Manila), which shows its strategic focus in the growing affluence of Asian gamers first.
It is his first concept album, which was inspired by the film of the same name.
The project started out by trying to ape its neighbours: the first concept looked like the lovechild of the swirling Pinnacle and the tilting Cheesegrater.
Embraer, for example, unveiled its first eVTOL concept.
The Kremlin adopted its first policy 'Concept of Federal Healthy Nutrition Policy in Russia by the Year 2005' in 1998.
