The phrase "authentic since" is correct and usable in written English.
It can be used to indicate the time period or starting point from which something has been genuine or true to its original form.
Example: "This restaurant has been serving authentic Italian cuisine, authentic since 1995."
Alternatives: "genuine since" or "true since".
Perhaps it's odd to say that this ambitious production feels more authentic, since Lorna, too, is a fictional character.
Frank G. Zarb, the finance authority's chairman, has cautioned that the surplus isn't authentic, since the county's $2.2 billion budget includes a $77 million state bailout.
Not only will you get better value for money, she said, but the experience may also feel more authentic, since you'll be in less tourist-dominated spots.
Fletcher and Bartlow sought $5m in damages and a declaration that the painting was authentic, since its sale was likely to earn them millions, based on recent sales of Doig's work.
(Regrettably, I had imbibed ubiquitous antisemitism during two decades as a radical activist in fundamentalist Islamist circles: I had read the Protocols of the Elders of Zion as a child, naively assuming it to be authentic, since thousands of copies of this fabricated text were distributed by Saudi-funded organisations in the UK in the 1980s).
Comparatively speaking, the two constructed-response tasks appear much more authentic since test takers are required to use English flexibly to express ideas.
But since I don't work in an authentic organization, since I work in an organization characterized by high levels of politics, much of a negative, I'll go on being the same political player I've been for the last 15 years.
A still fresh-looking copy of the ad hung in the office, in part proclaiming: To the most authentic humorist since Mark Twain, to the greatest heart that has beaten since the middle ages--W.C Fields, our friend.
The latter may have been influential because they seemed to incorporate an older and more authentic tradition, since they were based upon patterns developed in eastern India, the true homeland of Buddhism.
A museum spokeswoman said "we have had this authentic painting" since 1933.
I fell in love with public relations because, as its core, it's about storytelling and I've been fascinated with language and authentic storytelling since I studied the poet Williams Carlos Williams in college.
