Which category should be used for HMS Queen Mary?

Question

HMS Queen Mary lost at the Battle Jutland is categorised twice, under 1912 and 1913, probably because Wikipedia doesn't give her a  number, being the only one ever. Choice is date laid down, date commissioned or no date at all. Would the categorisation project decide, please?

Category: HMS_Queen_Mary_(1912)

Category: HMS_Queen_Mary_(1913)

Answer 1

She had 2 sister ships see http://dreadnoughtproject.org/tfs/index.php/Lion_Class_Battlecruiser_(1910)

Answer 2

Don't we use launch dates?  "She was launched on 20 March 1912 and was completed in August 1913"

If so, 1912 is correct and 1913 should be renamed to 1912. 

https://www.maritimequest.com/warship_directory/great_britain/battleships/queen_mary/hms_queen_mary.htm

Comments

Thank you.