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The S. Thomas’ Preparatory School Old Boys’ Union (OBU), an association comprising of past prepites, was formed on May 12th 1978, coinciding with the commemoration of the 40th Anniversary of the school. Its aim and purpose are to assist and aid the school when called upon to do so, with the collective assistance of its old boys, and to instill a sense of brotherhood and camaraderie amongst the students who have had the privilege of studying there, and since left.

© 2023 S. Thomas' Preparatory School Old Boys’ Union.
All Rights Reserved.

The Administrative Office,
S. Thomas' Preparatory School Old Boys' Union,

Address : No. 98, Steuart Place, Galle Road, Colombo 03.

Tel : 071 77 37 628
Email : prepobuadmin@prepobu.lk

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