The phrase "although it served" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding the function or purpose of something.
Example: "Although it served its purpose well, the old machine was eventually replaced with a newer model."
Alternatives: "even though it was useful" or "despite its functionality".
If he had a weakness, it was his inconsistent putting, although it served him well enough to get him to the very top of the game.
Although it served a lightly populated area, the opening of the GCR made Quainton Road an important junction station at which four railway lines met.
Building on this information, Hergé's depiction of the Japanese invasion was largely accurate, although it served as an outright attack on Japanese imperialism.
Ending the Oprah Winfrey Show was not the problem, although it served as a viable platform upon which she could speak empowerment into people's lives on a daily basis.
IGN UK expressed a mixed opinion about the character, feeling his personality was sometimes annoying, although it served to contrast with the serious attitudes of the other main characters.
We experienced AFI to have a lower resolution compared to high-resolution WLE, although it served well as a red flag technique.
Although it serves a multi-faith audience, this presenter refers to Jesus as "our Lord".
Only Westchester County guarantees the bonds and provides financing to the Westchester Medical Center, although it serves seven counties.
Although it serves alcohol and has several bars, the hotel also has a mosque, since Persian Gulf-area Muslims are among the target clientele.
At the height of the hardline Mahmoud Ahmadinejad's mandate (2005-13), Gol Agha's various publications began to disappear, although it serves as a small publishing house today.
The fire was a gloomy reminder to New Yorkers that the region's mass transit network, although it serves more passengers than any system in the nation, still functions very much as it did decades ago.
