Chimbu Warrior is correct. Wamina, Indonesia. The only aircraft bases there (2005) was a Cessna 206 supporting missionary work.
C2j
It was a busy day at Wamina with military and civilian flights.
Trigana Air Service was the major player utilizing 5 different types. Both the Caribou and Twin Otter have since been written off (unfortunately the DHC-6 with a major loss of life). Can't say for the ATY and F-27.
But, you say, that is only 4! Well, I was the fifth, and only jet (they hadn't yet begun to run 737's off the runway) and was operating under Trigana's AOC.
By the way... how does one find "What Aerodrome Mk I & II"?