Rossmoyne Primary School was established in 1964 and officially opened its doors on November 19, 1965.
Principal Geoff Anderson said the time capsule was buried somewhere on the Second Avenue property in June 1979.
�(The) 50th anniversary of the school seems like a good time to find it and look at what school in the 1970s looked like for our current students, and also show ex-students their preserved work; if we can find it,� Mr Anderson said.
�We first explored the idea of locating (the time capsule) for the 40th anniversary without much success.
�Having floated the mystery, we have had a few responses and recently there has been some more indication of its location. Over the coming months, we plan to verify some of these and see what we can do to locate it.�
The school will host an open day and community event on Friday, November 20, inviting the school community, past and present, to see how the school has changed.
From the original building, a library, which later became a music room, was added, as was a covered assembly area and courts.
There was an administration upgrade in the early �90s followed by a new library in 2001.
In 2010, two new four-classroom teaching blocks for middle and upper primary students were installed.
Mr Anderson said he hoped the school continued to build its reputation as an excellent, inclusive and community-oriented place.
�We would also like to enhance our facilities with the replacement of our early childhood facilities, which are well past their use-by date, with contemporary early childhood facilities consistent with those in the middle and upper part of the school,� he said.