Although not in north Wales for the game, the three celebrity owners were no doubt watching with interest from North America and getting the sense of an electric atmosphere at a packed Racecourse.
Captain James McClean started for Wrexham despite his involvement in a car accident on his way to training the previous day.
Alfie May should have done better with a header for Birmingham during the opening minutes and the visitors had appeals for a penalty waved away after the ball hit the arm of Dan Scarr.
But Wrexham not only weathered that early storm, they went ahead with their first effort on goal.
Rathbone picked up a loose ball and after advancing forward unleashed a curled effort from outside the box to beat Ryan Allsop.
The goal heralded a good spell for the hosts, although a promising counter-attack came to nothing when George Dobson failed to find Elliot Lee.
It was now an end-to-end contest and Wrexham's lead lasted all of nine minutes before Birmingham levelled with Dykes' header from a corner coming off Dobson.
May had an effort deflected wide while Dykes tried his luck from far out as Birmingham took a grip of the game, though Wrexham goalscorer Rathbone had the final effort of the first half - a shot that sailed over the bar.
Early in the second half Christoph Klarer failed to connect from a Birmingham corner, while Allsop denied both Ryan Barnett and McClean as the action switched from end to end.
Wrexham manager Phil Parkinson brought on Paul Mullin and Steven Fletcher for Lee and Ollie Palmer, looking to take full advantage of a good spell for his side.
The substitutes were immediately in the thick of the action as Fletcher's header from a free-kick was saved by Allsop, who also denied Mullin.
In a frantic finish Fletcher could not quite reach McClean's dangerous cross with a diving header, while at the other end Taylor Gardner-Hickman fired wide.