In the second spell both sides created opportunities but failed to turn them into goals although there was a hint that Western Springs' defenders were becoming a little lethargic and giving away silly fouls.
Substitute Birkenhead striker Sean Skeens had many chances to put his side ahead but seemed to casual at the clinical end.
However, Western Springs Lucas Imrie made amends in the 64th minute, after picking up a yelloiw card in the 57th minute, when he volleyed in a ball into the back of the net after it was lobbed back into a crowded 18m box following some lackadaisical attempts from Birkenhead to clear the ball from the stock exchange.
In the semifinals in the morning, defending champions Birkenhead beat overwhelmed Bay Olympic 4-1 while Western Springs pipped Glenfield Rovers 1-0 in an all-Auckland club affair.
In the satellite final, striker Max Mata was the toast of Onehunga with a hattrick in tjhe 11th, 37th and 58th minutes to seal a victory against Melville United who got a soliatory goal from Mark Glenister in the 44th minute for a 3-1 result in a clean and entertaining affair.
A Melville defender was sent off and a penalty kick awarded to Mata in the dying minutes for his hattrick in what was deemed to be a professional foul on a scoring opportunity.
Melville slayed the Marty Akers-coached Napier Marist 2-0 in their semifinal, dashing any hopes of two Bay flagbearers in next year's tourney, while Onehunga edged out FC Twenty XI 2-1.
The effects of seven other 25 to 30-minute games over three days were visibile in both finals.
Onehunga and Melville were both assured main draw berths before their final kicked off.