On arrival, guests took their seats in the Chapel for a service led by Reverend Warner Wilder. They then moved to the Old Collegians' Pavilion for pre-lunch refreshments.
Next followed a musical item by current Year 12 student Sam Brown, along with Mr Chris Artley.
The Master of Ceremonies was Warwick Wilson (Parnell, 1945-49), Grace was said by Duncan Bamfield (Selwyn, 1945-49) and the Toast to the College was given by Sir David Tompkins (School, 1943-46).
At the conclusion of the main course, prior to dessert, tea and coffee, Headmaster Michael Leach addressed the Old Collegians.
After lunch, the guests also had the opportunity to go for a tour of the school with the students.
The 70 Year On Reunion included everyone who joined the College in or before 1945.