Joseph Ejercito Estrada Panunumpa Sa Tungkulin Ni Pangulong (swearing in) medal at Simbahan ng Barasoan on June 30, 1998

The obverse shows President Estrada, his wife and mother, and his best friend Fernando Poe, Jr inside the 114 year old Barasoam Church in Malolos, Bulacan at 12:00 noon on June 30, 1998. He was the first President to take his oath in the Pilipino language and inside this newly renovated church where the country's first President, Emilio Aguinaldo, took his oath in 1898. 

The reverse shows the Palace, which was originally built as an Antillean inspired stone house/or in Pilipino "bahay na bato" in the 18th century by the Spaniard, Don Luis Rocha. The 78 Stars appearing on the periphery represents the 78 provinces of the Philippines. 

This coin is made of a Nickel Brass Alloy, which is 70% Cu, 5% Ni, and 24.5% Zn. It is round and has a diameter of 26.0 mm and weighs 9.45 grams.

This coin was minted by the Bangko Sentral Ng Pilipinas. It is still in it's mint issued holder, with COA card. 

I have listed other coins and notes from the Philippines.