"flagship sign" is a correct and usable phrase in written English.
It refers to the most prominent or important sign of a company or organization. Example: The bright neon sign reading "Welcome to XYZ Corporation" was the flagship sign of the business and could be seen from miles away. It was a symbol of the company's success and prestige.
Air China, the country's flagship carrier, signed an agreement to buy five Boeing 747-8 aircraft, each capable of carrying more than 460 passengers, as part of its drive to expand its international network.
I had to remind myself that Mossbourne has its flagship status and signed photograph of Tony Blair in the foyer for good reason.
All 28 European Union member states have signed a flagship agreement for a common foundation for a 5G network.
It has 250 employees now, up from 170 a year ago, and signed a flagship partnership with Facebook to build custom ad audiences for it and help it measure ad ROI.
The sign outside its flagship cafe, translated, reads, "Vision: Everyone has the right to good ice cream".
The Japanese capitulation was signed aboard his flagship, the USS "Missouri," in Tokyo Bay on Sept. 2, 1945.
Hispanic Television Network Inc., a Spanish-language broadcaster, has bought nine TV stations, including a new flagship station in Texas, and signed up three more affiliates as it expands in important Hispanic markets.
Smith was recently signed as a flagship artist on Broken Bow Records' imprint Wheelhouse Records, and his new single "Backroad Song" is finding huge support at country radio, where it's in the Top 15 and climbing.
THE GERMAN TOUCH Half an hour later, on the outskirts of Kaluga, the coach swings sharply right, opposite a seemingly unending single-storey grey complex, identified by its sign as Volkswagen's flagship assembly plant.
Prospective BlackBerry owners will have to shell out $199 for the Canadian company's new flagship and (for better or worse) sign a two year contract.
