I agree, the pic is not a 73X
If I am not mistaken, Lionair was the launch customer for the 900 series, and has the largest order for the type..
Like a response from Microsoft support, your answer is technically correct...
However, AS was the offical launch customer of the 900 back in 1995. Just to pick nits, Lion Air was the first customer for the 737-900
ER (Extended Range), with an order for 30 aeroplanes. That was circa 2005.